The word "re-lease" means to release something for a second time. The antonyms for this word are hold, keep, retain, and withhold. These words refer to the act of keeping something without letting it go or releasing it. When a person holds onto something, they have it in their possession but do not let it go. Retaining something means keeping it in one's possession or control for a certain period of time. Similarly, withholding something means refraining from releasing it to someone else. These antonyms are useful when trying to express the idea of keeping something rather than letting it go or releasing it again.