Antonyms for the phrase "takes an oath" include "breaks a promise," "lies under oath," "renounces," "denounces," "withdraws a pledge," "abandons an obligation," and "neglects a commitment." Taking an oath is a solemn commitment made to fulfill a specific task or duty, and their antonyms indicate a deviation from that commitment. The act of breaking a promise or lying under oath involves a breach of trust and can lead to serious consequences. Renouncing, denouncing, or withdrawing a pledge means to abandon a commitment once made. Neglecting a commitment or abandoning an obligation shows a lack of responsibility and can have severe consequences in personal and professional life.