Relating to babies or very young children; or acting in an immature and childish way.
From Latin 'infantilis,' derived from 'infans' meaning unable to speak (in- 'not' + fari 'to speak'). Originally it simply meant baby-related.
The word 'infant' literally means 'one who cannot speak,' which is why infantile regression is so fascinating—our brains literally revert to pre-speech patterns when traumatized, showing how deep language and development are connected.
Infantile derives from medical/psychological language but carries dehumanizing bias when applied to groups (historically women, colonized peoples, disabled individuals) to justify exclusion from power.
Reserve for literal developmental contexts. Avoid as a moral/intellectual judgment about people. Use 'immature', 'underdeveloped', or 'simplistic' for behavioral critique.
["immature","simplistic","underdeveloped"]
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