immature
adjective
- acting like a child
- not ready
Wiktionary
Pronunciation: /ɪməˈtjʊə(ɹ)/ / /ɪməˈt͡ʃʊə(ɹ)/ / /ɪməˈt͡ʃə(ɹ)/
adj
Etymology: From Middle French immature. Partially displaced unripe, from Old English unrīpe (“unripe, immature”).
- Occurring before the proper time; untimely, premature (especially of death).
“And thou also canst best account for the causes of her immature death […].”
- Not fully formed or developed; not grown.
- Childish in behavior; juvenile.
“You're only young once, but you can be immature the rest of your life.”
“The man was immature for throwing a tantrum.”
noun
Etymology: From Middle French immature. Partially displaced unripe, from Old English unrīpe (“unripe, immature”).
- An immature member of a species.
“There are many genera and even families of Brachypylina for which immatures are not yet known, and thus numerous examples of adult convergence and misclassification remain to be revealed: such is the case with Hypozetes.”
“While on a walk the next morning I found what looked like a patch of old growth habitat - perhaps somewhere the fires had missed - and to my astonishment saw a female Red-lored Whistler accompanied by an immature.”