The word "beleaguer" means to surround or besiege with military forces. Its antonym, or opposite meaning, is "liberate" which means to set free or release from captivity. Other antonyms for "beleaguer" include "aid" which means to help or support someone in need, "assist" which denotes providing aid or support, and "unblock" which denotes removing an obstruction or impediment. The term "rescue" is another antonym for beleaguer which suggests saving someone from a dangerous or unpleasant situation. These antonyms for "beleaguer" convey the ideas of freedom, support, and relief from confinement or oppression.