The term "caved into" refers to a situation in which an individual has given in or succumbed to pressure, persuasion or force. Antonyms to this phrase include terms such as resist, hold out, persist, endure and withstand. When a person resists, he tries not to give in to pressure and holds his ground. Holding out implies that one is determined not to give in despite the circumstances. To persist is to continue trying even when faced with challenges. Endurance implies that one can withstand tough circumstances, and finally, to withstand denotes the ability to resist pressure without giving in. Knowing antonyms for common phrases can help expand one's vocabulary and communication skills.