The phrase "gave oneself over" typically implies surrender or submission to a particular action or experience. Some antonyms for this phrase could include terms like resisted, refused, withstood, repelled, or rejected. These words suggest different degrees of opposition or struggle against the idea of submitting oneself fully to a particular activity or mindset. Other antonyms might include terms like hesitated, hesitated, avoided, or shied away from, which suggest a reluctance or hesitation to fully engage with the situation at hand. Ultimately, the choice of antonym will depend on the specific context and tone of the original phrase, as well as the desired effect or emphasis in the writer's message.