Synonyms of 'wear down'
▷ See wear
If someone's authority, right, or confidence erodes or is eroded, it is gradually destroyed or removed.
His fumbling of the issue of reform has eroded his authority.
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Thesaurus for wear down from the Collins English Thesaurus
If you wear something down or if it wears down , it becomes flatter or smoother as a result of constantly rubbing against something else.