FORSWEAR, verb transitive preterit tense forswore; participle passive forsworn. See Swear and Answer.]
1. To reject or renounce upon oath.
2. To deny upon oath.
Like innocence, and as serenely bold as truth, how loudly he forswears thy gold.
To forswear one's self, is to swear falsely; to perjure one's self.
Thou shalt not forswear thyself. Matthew 5:33.
FORSWEAR, verb intransitive To swear falsely; to commit perjury.