Antonyms for the term "exerted oneself" could include words such as "relaxed," "rested," "quiescent," or "inactive." These words suggest a lack of effort put forth by an individual, rather than active exertion. "Surrendered," "yielded," or "abandoned" are also useful antonyms, as they imply a relinquishing of control or responsibility. Some antonyms could also be "neglected," "avoided," or "neglected" as they denote a lack of action or avoidance of responsibility. It is important to note that antonyms can vary based on context and perspective, and multiple words may serve as effective antonyms for the same term depending on the context in which it is used.