The phrase "be vested" refers to the act of possessing a legal or equitable right to something. The antonyms for this phrase include "be divested," "lose ownership," "give up rights," "forfeit," and "surrender." These words reflect the opposite of being vested, which means giving up or losing one's rights or property. In legal terms, an individual who is not vested may not have the right to control or dispose of their assets. Understanding the antonyms for "be vested" is important when dealing with legal matters or contracts where the ownership of property, stocks, or other assets is being transferred.