immature

[ im-uh-choor, -toor, -tyoor, -chur ]
/ ˈɪm əˈtʃʊər, -ˈtʊər, -ˈtyʊər, -ˈtʃɜr /

adjective

not mature, ripe, developed, perfected, etc.
emotionally undeveloped; juvenile; childish.
Physical Geography. youthful(def 5).
Archaic. premature.

Origin of immature

First recorded in 1540–50, immature is from the Latin word immātūrus unripe, hence, untimely. See im-2, mature

SYNONYMS FOR immature

2 callow, puerile, babyish.

OTHER WORDS FROM immature

im·ma·ture·ly, adverb im·ma·ture·ness, noun

Words nearby immature

immanuel, immaterial, immaterialism, immateriality, immaterialize, immature, immature cataract, immaturity, immeasurable, immediacy, immediate

British Dictionary definitions for immatureness

immature
/ (ˌɪməˈtjʊə, -ˈtʃʊə) /

adjective

not fully grown or developed
deficient in maturity; lacking wisdom, insight, emotional stability, etc
geography a less common term for youthful (def. 4)

Derived forms of immature

immaturity or immatureness, noun immaturely, adverb

Medical definitions for immatureness

immature
[ ĭm′ə-chur′, -tur′ ]

adj.

Not fully grown or developed.