immatureness

immature

[im-uh-choor, -toor, -tyoor, -chur]
adjective
1.
not mature, ripe, developed, perfected, etc.
2.
emotionally undeveloped; juvenile; childish.
3.
Physical Geography, youthful ( def 5 ).
4.
Archaic. premature.

Origin:
1540–50; < Latin immātūrus unripe, hence, untimely. See im-2, mature

immaturely, adverb
immatureness, noun


2. callow, puerile, babyish.
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World English Dictionary
immature (ˌɪməˈtjʊə, -ˈtʃʊə)
 
adj
1.  not fully grown or developed
2.  deficient in maturity; lacking wisdom, insight, emotional stability, etc
3.  geography a less common term for youthful
 
imma'turity
 
n
 
imma'tureness
 
n
 
imma'turely
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

immature
1548, "untimely, premature," from L. immaturus "untimely, unripe," from in- "not" + maturus (see mature). In 16c., usually in ref. to death; modern sense of "not fully developed" first recorded 1641.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

immature im·ma·ture (ĭm'ə-tyur', -tur', -chur')
adj.
Not fully grown or developed.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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