To think something is wrong or bad and express that you don't like it or agree with it.
From Old French 'desaprover,' combining 'dis-' (not) and 'approve.' The prefix literally negates approval, creating a word that has meant 'to reject or condemn' since the 16th century.
Disapprove is fascinating because it's not just disagreement—it has a moral weight to it, which is why a parent's disapproving look feels so heavy; you're not just saying 'I disagree,' you're saying 'this is wrong.'
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