ju·ve·nile

[joo-vuh-nl, -nahyl]
adjective
1.
of, pertaining to, characteristic of, or suitable or intended for young persons: juvenile books.
2.
young; youthful: juvenile years.
3.
immature; childish; infantile: His juvenile tantrums are not in keeping with his age.
noun
4.
a young person; youth.
5.
Theater.
a.
a youthful male or female role.
b.
an actor or actress who plays such parts.
6.
a book for children.
7.
Ornithology. a young bird in the stage when it has fledged, if altricial, or has replaced down of hatching, if precocial.
8.
a two-year-old racehorse.
00:10
Juvenile is an SAT word you need to know.
So is hardihood. Does it mean:
boldness or daring; courage.
something left out, not done, or neglected

Origin:
1615–25; < Latin juvenīlis youthful, equivalent to juven(is) youthful + -īlis -ile

ju·ve·nile·ly, adverb
pre·ju·ve·nile, adjective
un·ju·ve·nile, adjective
un·ju·ve·nile·ly, adverb
un·ju·ve·nile·ness, noun

jejune, juvenile.


1. See young.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
juvenile (ˈdʒuːvɪˌnaɪl) [Click for IPA pronunciation guide]
 
adj
1.  young, youthful, or immature
2.  suitable or designed for young people: juvenile pastimes
3.  (of animals or plants) not yet fully mature
4.  of or denoting young birds that have developed their first plumage of adult feathers
5.  geology occurring at the earth's surface for the first time; new: juvenile water; juvenile gases
 
n
6.  a juvenile person, animal, or plant
7.  an actor who performs youthful roles
8.  a book intended for young readers
 
[C17: from Latin juvenīlis youthful, from juvenis young]
 
'juvenilely
 
adv
 
'juvenileness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

juvenile
1625, from L. juvenilis "of or belonging to youth," from juvenis "young person," originally "young" (see young). Hence juvenilia "works of a person's youth" (1622). Juvenile delinquency first recorded 1816.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Thomas said she's visited her son in the juvenile detention center, where on
  some visits they are separated by glass.
We have urged juvenile justice reform for decades.
In times when summer temperatures peaked, researchers found juvenile cod --
  born in late winter -- to be smaller than usual.
But they are both juvenile and very cumbersome.
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