Made an incorrect or unfair decision about someone or something; formed a wrong opinion or assessment.
From Old English 'mis-' (wrongly) combined with 'judge' from Latin 'judicare'. The prefix 'mis-' has been used in English for over a thousand years to indicate doing something incorrectly.
We misjudge people constantly based on first impressions, which is why the saying 'don't judge a book by its cover' exists—our brains are quick to judge but often wrong. The 'mis-' prefix shows up in tons of words when humans get things wrong.
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