adj. Function: adjective
significantly deficient in maturity FF1C; a childish and spiteful attitude FF1E;
Synonyms: babyish, immature, infantile, infantine, prekindergarten, puerile
Related Words: asinine, fatuous, foolish, silly, simple; naive, unsophisticated; arrested, backward, moronic, retarded, slow, ||wanting
Antonyms: adult