term:

Forswear

forswear vb

-swore [-swōr]
-sworn [-swōrn]
-swear·ing
vt
1 : to reject, renounce, or deny under oath
2 : to renounce earnestly
vi
: to swear falsely
: commit false swearing

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.