What is "to forswear one's self"

Forswear \For*swear"\, v. t. [imp. Forswore; p. p. Forsworn; p. pr. & vb. n. Forswearing.] [OE. forsweren, forswerien, AS. forswerian; pref. for- + swerian to swear. See For-, and Swear, v. i.]

1. To reject or renounce upon oath; hence, to renounce earnestly, determinedly, or with protestations.

   I . . . do forswear her.
   --Shak.

2. To deny upon oath.

   Like innocence, and as serenely bold As truth, how loudly he forswears thy gold!
   --Dryden.

   To forswear one's self, to swear falsely; to perjure one's self. ``Thou shalt not forswear thyself.''
   --Matt. v. 3

3. Syn: See Perjure.