8 letters · 12 points in Scrabble
adjective characteristic of a lack of maturity
adjective (used of living things especially persons) in an early period of life or development or growth
adjective not fully developed or mature; not ripe
originFrom Middle French immature. Partially displaced unripe, from Old English unrīpe (“unripe, immature”).
Etymology from Wiktionary, CC BY-SA 3.0