con·tro·nym/ˈkäntrəˌnim/nounnoun: contronym; plural noun: contronyms; noun: contranym; plural noun: contranyms
- a word with two opposite meanings, e.g. sanction (which can mean both ‘a penalty for disobeying a law’ and ‘official permission or approval for an action’).
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He was put out that his girlfriend puts out. (not a true contronym but…)