The phrase "letting oneself for" means giving in or surrendering to something. Its antonyms, or words with opposite meanings, include resisting, opposing, standing firm, and being steadfast. To resist means to push back against something, while opposing means to actively work against it. Standing firm implies a determined resolve, while being steadfast suggests a resolute commitment. These antonyms can apply to a range of situations, whether it be resisting a temptation, opposing an unjust law, standing firm in one's beliefs, or being steadfast in a relationship. By embracing such antonyms, we can assert our agency and retain control over our lives.