The antonyms for "delivers up" are "protect", "hide", "conceal", "retain" and "withhold". These words mean the opposite of delivering something up, which refers to submitting or surrendering something or someone to another person or authority. Protecting implies defending something or someone from harm or danger. Hiding and concealing involve keeping something or someone unseen or unnoticed. Retaining suggests keeping something in one's possession or control. Withholding refers to the act of refusing to give or allow something. Using these antonyms, we can convey the opposite of delivering up something in various contexts, such as in law enforcement, personal relationships, or business transactions.