VERB
作伪证；发假誓
If someone perjures themselves in a court of law, they lie, even though they have promised to tell the truth.
例句
Witnesses lied and perjured themselves...
证人撒谎作伪证。
She would rather perjure herself than admit to her sins.
她宁愿在法庭上撒谎也不愿承认她的罪行。