Antonyms for the phrase 'pledge oneself' are words that convey the opposite of making a commitment or promise. Some antonyms include 'refuse,' 'deny,' 'reject,' 'disavow,' 'renounce,' and 'repudiate.' When someone denies or refuses to pledge themselves, they are essentially saying they do not want to make a commitment or take responsibility for anything. Rejecting the idea of pledging oneself can be interpreted as a lack of trust or faith in others, or simply a desire to remain independent. Meanwhile, disavowing or renouncing a pledge is an explicit act of revoking one's promise, which can have consequences for relationships and trust. Ultimately, the choice to pledge oneself or not is a personal one that reflects individual values, priorities, and beliefs.