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The Radio Boys Trailing a Voice
The Radio Boys Trailing a Voice

Chapter I · Chapter 1

Chapter 1 of The Radio Boys Trailing a Voice is here in full — 19 sentences across 4 reading sections, with audio for every sentence and word.

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Context Illustration Reading 1/3 · 5 lines
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The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.
Made in the United States of America 12mo.
Cloth.
Illustrated.
THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail
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AI-generated narration by OpenAI · Slow US English
LEARNER DICTIONARY
Archivist
/ˈɑːrkɪvɪst/
Editorial verification pending

A keeper or guardian of historical records and memories.

The Radio Boys Trailing a Voice

Chapter I · Chapter 1

Chapter 1 of The Radio Boys Trailing a Voice is here in full — 19 sentences across 4 reading sections, with audio for every sentence and word.

Reading 1/3 · 5 reading units · Lines 1–5

Line 1
The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.
Line 2
Made in the United States of America 12mo.
Line 3
Cloth.
/klɔːθ/
Line 4
Illustrated.
/ˈɪləstreɪtəd/
Line 5
THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

Learner Dictionary

These definitions explain words found in the current reading and keep every example grounded in its original sentence.

Oxford-style entry order: headword, part of speech, US IPA, concise definition, contextual example, and audio.

Fireman noun US /ˈfaɪrmən/

play in which children pretend to put out a fire

From this reading “THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail”

Radio noun US /ˈreɪdioʊ/

medium for communication

From this reading “The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.”

Registered adjective US /ˈredʒɪstərd/

(of animals) officially recorded with or certified by a recognized breed association; especially in a stud book

From this reading “The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.”

Roundhouse noun US /ˈraʊndhaʊs/

workplace consisting of a circular building for repairing locomotives

From this reading “The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.”

Solving noun US /ˈsɑːlvɪŋ/

finding a solution to a problem

From this reading “THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail”

switch verb US /swɪtʃ/

change over, change around, as to a new order or sequence

From this reading “THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail”

Trademark noun US /ˈtreɪdmɑːrk/

a distinctive characteristic or attribute

From this reading “The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.”

Wireless noun US /ˈwaɪrlɪs/

medium for communication

From this reading “The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.”

All words in this reading · 48

Every word in these five lines is listed here, and every one of them can be played on its own.

Dictionary details are shown only when verified; these are not licensed Oxford entries.

12

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Made in the United States of America 12mo.

AdeterminerUS /ə/

used before a singular noun to mean one of a group, when it is not a particular one

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

AmericanounUS /əˈmerəkə/

North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776

From this reading Made in the United States of America 12mo.

ArmynounUS /ˈɑːrmi/

a permanent organization of the military land forces of a nation or state

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

atprepositionUS /æt/

in or near a particular place or position

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

AuthornounUS /ˈɔːθər/

writes (books or stories or articles or the like) professionally (for pay)

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

BecomeverbUS /bɪˈkʌm/

enter or assume a certain state or condition

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

BoundadjectiveUS /baʊnd/

confined by bonds

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

BoysnounUS /bɔɪz/

plural of “boy” — a youthful male person

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

ClearingnounUS /ˈklɪrɪŋ/

a tract of land with few or no trees in the middle of a wooded area

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

ClothnounUS /klɔːθ/

artifact made by weaving or felting or knitting or crocheting natural or synthetic fibers

From this reading Cloth.

ENGINEnounUS /ˈendʒən/

motor that converts thermal energy to mechanical work

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

Etc

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

FiremannounUS /ˈfaɪrmən/

play in which children pretend to put out a fire

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

FirstadjectiveUS /fɜːrst/

preceding all others in time or space or degree

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

IllustratedverbUS /ˈɪləstreɪtəd/

past form of “illustrate” — clarify by giving an example of

From this reading Illustrated.

inprepositionUS /ɪn/

inside something, or within a place, period, or state

From this reading Made in the United States of America 12mo.

LimitedadjectiveUS /ˈlɪmətəd/

small in range or scope

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

MadeadjectiveUS /meɪd/

produced by a manufacturing process

From this reading Made in the United States of America 12mo.

MailnounUS /meɪl/

the bags of letters and packages that are transported by the postal service

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

MannounUS /mæn/

an adult person who is male (as opposed to a woman)

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

monounUS /moʊ/

an indefinitely short time

From this reading Made in the United States of America 12mo.

MountainnounUS /ˈmaʊntən/

a land mass that projects well above its surroundings; higher than a hill

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

MysterynounUS /ˈmɪstəri/

something that baffles understanding and cannot be explained

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

onprepositionUS /ɑːn/

touching and supported by a surface

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

OrconjunctionUS /ɔːr/

used to join alternatives or possibilities

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

PassverbUS /pæs/

go across or through

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

RadionounUS /ˈreɪdioʊ/

medium for communication

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

RAILROADnounUS /ˈreɪlroʊd/

line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

Ralph

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

RegisteredadjectiveUS /ˈredʒɪstərd/

(of animals) officially recorded with or certified by a recognized breed association; especially in a stud book

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

RoundhousenounUS /ˈraʊndhaʊs/

workplace consisting of a circular building for repairing locomotives

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

SeriesnounUS /ˈsɪriz/

similar things placed in order or happening one after another

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

SolvingnounUS /ˈsɑːlvɪŋ/

finding a solution to a problem

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

StatesnounUS /steɪts/

plural of “state” — the territory occupied by one of the constituent administrative districts of a nation

From this reading Made in the United States of America 12mo.

SWITCHverbUS /swɪtʃ/

change over, change around, as to a new order or sequence

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

ThedeterminerUS /ðə/

used before a noun that is already known, already mentioned, or the only one of its kind

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

toparticleUS /tuː/

used before the base form of a verb to make the infinitive

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

TOWERnounUS /ˈtaʊər/

a structure taller than its diameter; can stand alone or be attached to a larger building

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

TracknounUS /træk/

a line or route along which something travels or moves

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

TrademarknounUS /ˈtreɪdmɑːrk/

a distinctive characteristic or attribute

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

TRAILINGnounUS /ˈtreɪlɪŋ/

the pursuit (of a person or animal) by following tracks or marks they left behind

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

TrainverbUS /treɪn/

create by training and teaching

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

UnitedadjectiveUS /juːˈnaɪtɪd/

characterized by unity; being or joined into a single entity

From this reading Made in the United States of America 12mo.

VOICEnounUS /vɔɪs/

the distinctive quality or pitch or condition of a person's speech

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

WirelessnounUS /ˈwaɪrlɪs/

medium for communication

From this reading The Radio Boys Series (Trademark Registered) Author of The Radio Boys' First Wireless The Radio Boys at Mountain Pass Ralph of The Roundhouse Ralph on the Army Train, Etc.

YoungadjectiveUS /jʌŋ/

(used of living things especially persons) in an early period of life or development or growth

From this reading THE RADIO BOYS SERIES (Trademark Registered) THE RADIO BOYS TRAILING A VOICE Or Solving a Wireless Mystery THE RAILROAD SERIES RALPH OF THE ROUNDHOUSE Or Bound to Become a Railroad Man RALPH IN THE SWITCH TOWER Or Clearing the Track RALPH ON THE ENGINE Or The Young Fireman of the Limited Mail

Chapter 1 of The Radio Boys Trailing a Voice by Allen Chapman holds 19 sentences, grouped into 4 reading sections of at most 5 sentences. The text is the source edition, unabridged, and the chapter records which sentences cover which part of the work so that nothing is dropped. Every word can be tapped for its pronunciation and dictionary entry.

What does chapter 1 of The Radio Boys Trailing a Voice contain?

Chapter 1 holds 19 sentences of The Radio Boys Trailing a Voice, unabridged, divided into 4 reading sections.

This page carries chapter 1 of The Radio Boys Trailing a Voice by Allen Chapman exactly as it stands in the source edition, without abridgement. It runs to 19 sentences, grouped into 4 sections of at most 5 sentences so that a reader can take the chapter in steady, finishable pieces. The chapter also stores a coverage record mapping every one of its sentences to a part of the work, which is how the edition demonstrates that no line was dropped.

How do I study chapter 1 of The Radio Boys Trailing a Voice?

Work through the 4 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 4 sections in this chapter is short enough to read once, hear once, and then re-read with the vocabulary in view. Tapping a word plays it alone and opens its dictionary entry with IPA, part of speech and meaning, so the reader is never forced to guess a pronunciation from spelling. Working section by section keeps a long chapter from becoming an undifferentiated wall of text, which is the usual reason a reader abandons a work of this period.

Can chapter 1 be read aloud to me?

Yes — every sentence and every individual word in chapter 1 can be played aloud in United States English.

Audio covers the whole chapter: any sentence can be played, and any single word within it can be played on its own. The voice uses United States English. For a work of this period that matters, because spelling is an unreliable guide to pronunciation for vocabulary that has fallen out of daily use, and a learner who guesses wrong tends to keep the error. Hearing the word in its own sentence, and then alone, settles it.

Questions about reading The Radio Boys Trailing a Voice

Common questions about reading The Radio Boys Trailing a Voice by Allen Chapman on this page, its source edition and its audio.

Is this the complete text of The Radio Boys Trailing a Voice?

Yes. All 2693 sentences of Project Gutenberg eBook #25858 are kept, with a record of which sentences cover which part.

Which edition of The Radio Boys Trailing a Voice is used?

Project Gutenberg eBook #25858, unabridged. The Project Gutenberg header, footer and licence are removed.

How long does The Radio Boys Trailing a Voice take to read?

About 224 minutes of reading across 539 sections of 5 sentences each, at an unhurried pace.

How to read The Radio Boys Trailing a Voice section by section

How to work through The Radio Boys Trailing a Voice section by section, using the audio and the tap-to-define vocabulary.

  1. Open a chapter

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  2. Read one section

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  3. Listen and tap

    Play the section aloud, then tap any unfamiliar word for its entry.

Vocabulary met early in The Radio Boys Trailing a Voice

Words and structures a reader meets early in The Radio Boys Trailing a Voice, each tappable for pronunciation and meaning.

Radio
A word that appears in the opening chapter of The Radio Boys Trailing a Voice; the reader can tap it to hear it and see its dictionary entry.
Series
A word that appears in the opening chapter of The Radio Boys Trailing a Voice; the reader can tap it to hear it and see its dictionary entry.
Trademark
A word that appears in the opening chapter of The Radio Boys Trailing a Voice; the reader can tap it to hear it and see its dictionary entry.
Registered
A word that appears in the opening chapter of The Radio Boys Trailing a Voice; the reader can tap it to hear it and see its dictionary entry.