Showing no feelings or emotions; remaining calm and detached in situations that would normally provoke emotional responses.
From 'emotion' (from Latin 'emovere,' to stir up) + '-less' (lacking); became common in English by the 19th century as psychology developed terminology for emotional states.
People who appear emotionless might actually have alexithymia, a neurological condition where they cannot identify or describe their own emotions—their brain literally can't label what they're feeling.
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