Reduced the quality, value, or reputation of something; took away from someone's accomplishment or standing in the past tense.
Past tense of detract, adding -ed to show completed action. The form is regular, following the standard English pattern for past tense.
In a movie review, a critic might write 'the weak ending detracted from an otherwise great film'—it's a polite, sophisticated way of saying something ruined part of the experience.
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