perjure
verb transitive[L. perjuro; per and juro, to swear; that is, to swear aside or beyond.]
perjur. Willfully to make a false oath when administered by lawful authority or in a court of justice; to forswear; as, the witness perjured himself.
[L. perjuro; per and juro, to swear; that is, to swear aside or beyond.]