matured Antonyms

not updated unripe unformed unfledged unfinished soured raw puppyish puerile minor malachite little juvenile juvenescent jejune unsophisticated yeasty unripened unpracticed undigested unaged wet behind the ears kiddish undeveloped unchanged boylike man-child baby-faced youthful youngish young infantile inexperienced blooming backward babyish babied baby babish authentic archaic antique antiquated antediluvian ancient ageless adolescent blossoming bosky immature