The antonyms for the phrase "committed oneself" are "disengaged" or "uninvolved". When someone is uncommitted, they may lack enthusiasm or interest in a task, or they may be hesitant about taking on responsibilities. They may also refuse to make any firm promises or commitments to a particular cause, person, or project. Being uncommitted can be perceived as a negative trait, demonstrating a lack of dedication, loyalty, or persistence, but it can also be seen as an expression of freedom, independence, or flexibility. Ultimately, whether someone chooses to commit or remain uncommitted depends on their values, priorities, and preferences.