Deliberately paid no attention to someone or something; refused to acknowledge or notice.
From Latin 'ignorare' (not to know), combining 'in-' (not) and 'gnarus' (knowing). Shifted from 'not knowing' to 'deliberately not paying attention.'
The root 'gnarus' means knowing, so to 'ignore' someone is literally to say 'I don't know you exist'—which is actually one of the harshest social punishments we have.
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