Antonyms for the phrase "be in force" could include phrases such as "be null and void," "cease to apply," "expire," or "become invalidated." When something is no longer in force, it means that it no longer has any legal or binding power or authority. Antonyms for this phrase may suggest a situation where rules or laws are not being followed or a temporary situation where the rules or laws do not apply. The opposite of being in force may also imply a need for action or change, as laws or regulations may need to be updated or revisited in order to remain relevant and effective.