contronym
A contronym, also known as an auto-antonym or a Janus word, is a word with two or more meanings that are opposite or nearly opposite. The intended meaning depends on context, and the word can appear in contradictory ways in different sentences.
The term highlights semantic ambiguity that arises as words acquire new senses through metaphorical extension, reanalysis,
Common contronyms include: sanction (to permit; to penalize); oversight (supervision; an omission); bound (destined for; restrained);