Middle English forsweren, from Old English forswerian (“to swear falsely”). Cognate with Old Saxon farswerian, Old High German farsweren, German verschwören. More at for- + swear.
forswear (third-person singular simple present forswears, present participle forswearing, simple past forswore, past participle forsworn)
- (transitive) To renounce or deny something, especially under oath.
1726, John Dryden, translating Juvenal, Satires:
- Like Innocence, and as serenely bold / As Truth, how loudly He forswears thy Gold!.
1995, Philip Roth, Sabbath's Theater:
- Either forswear fucking others or the affair is over.
2008, Philip Roth, Indignation:
- The sheer unimaginableness of coming into her mouth — of coming into anything other than the air or a tissue or a dirty sock — was an allurement too stupendous for a novice to forswear.
- (intransitive) To commit perjury.
To renounce or deny something, especially under oath.