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infantile

adjective

/ˈɪnfəntaɪl/

Meaning

characteristic of an infant; childish

His infantile behavior embarrassed everyone at the meeting.

childish, immature, juvenile, babyish

mature, adult, grown-up

infantile behavior, infantile disease, infantile reaction

Of the same kind; alike.

Existing but not yet developed or manifested; hidden potential.

surprised or astonished; confused or puzzled

Not aware of or not concerned about what is happening around one; unmindful.

Characterized by malice; intending or intended to do harm.

unable to read or write; lacking education