To make someone lose their loyalty, confidence, or contentment; to make someone dissatisfied.
From dis- (opposite) + affect (from Latin affectus, 'disposed toward'). The verb emerged in 17th-century English during political turmoil to describe loyalty erosion.
This word perfectly captures what happened to the American colonies before 1776—British policies didn't just anger people, they systematically 'disaffected' them, making it a key word in understanding revolution.
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