Commits Perjury is an act of lying under oath or affirmation in a court of law. It is a criminal offense and can result in serious consequences, including fines, jail time, and even the loss of one's professional license. The term 'commits perjury' is derived from the Latin phrase perjurium, which means 'to swear falsely.' The crossword solution for this term is 'LIES, ' which accurately describes the act of committing perjury.