adjective

childish

childish

His behavior was very childish.

His behaviour was very childish.

Stop making childish excuses.

Stop making childish excuses.

be + ((childish)) His behavior was very childish.

((childish)) + noun Stop making childish excuses.

Synonyms: immature, juvenile; Antonyms: mature, adult

From 'child' plus the suffix '-ish', meaning 'like' or 'having the qualities of'.

This word usually has a negative connotation, implying immaturity. 'Childlike' is more positive, suggesting innocence.

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