infantile

word

Definition

Relating to babies or very young children; it can also mean childish or immature in behavior or attitude.

Usage & Nuances

Often formal or disapproving when applied to adults ('infantile behavior'), and not usually used for literal children. Common in medical, psychological, or critical contexts. Do not confuse with simply 'childish'—'infantile' is more severe or technical.

Example Sentences

His argument sounded infantile to everyone.

basic

Her reaction was very infantile.

basic

The doctor studied infantile diseases.

basic

Stop being so infantile—we need to talk seriously.

natural

He considers any criticism as an infantile attack.

natural

Their laughter seemed almost infantile, but it made everyone smile.

natural