From Middle English atstunten, etstunten, ætstunten, from Old English ætstyntan (“to blunt, dull, weaken”), equivalent to at- + stunt or at- + stint. See astint.
atstunt (third-person singular simple present atstunts, present participle atstunting, simple past and past participle atstunted)
- (transitive, obsolete) To bring to an end; put a stop to.
- (intransitive, obsolete) To stop; stay; remain.