The word "be leaguering" means to besiege or to surround with an army or group. The antonym of this word is to liberate or to free. Liberating a city from a siege or freeing a person from captivity are examples of antonyms for be leaguering. Another antonym could be to abandon or to leave, as the opposite of besieging is to simply walk away and leave the area. In any case, these antonyms represent the opposite actions of what it means to be leaguering. While be leaguering represents an aggressive and forceful action, its antonyms represent freedom, peace, and non-aggression.