"Be troth" is a verb that means to pledge oneself to another in marriage. Its antonyms would be words that convey the opposite meaning, such as "divorce," "separate," "break up," "annul," "cancel," and "dissolve." These words indicate a termination or an undoing of the union that "be troth" describes. Other antonyms could include "single," "unattached," or "uncommitted," which signify not being in a committed relationship. While "be troth" is a term associated with the joy of joining lives, its antonyms carry negative connotations of separation or lack of commitment. Thus, it is imperative to choose one's words wisely when discussing relationships.