matured Antonyms

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