The phrase "cave to" means to give in, yield or surrender to someone or something. Antonyms for this phrase include resist, defy, oppose, challenge, confront, stand firm, hold out, and refuse. By resisting or opposing, one can refuse to submit or give in to someone else's demands or expectations. To challenge or confront, one can assert their own beliefs and opinions, rather than simply acquiescing. Holding out, or standing firm can also be a way of not giving in to external pressure. Ultimately, using these antonyms can empower individuals to take control of their own lives, rather than being passive or submissive.