The word "be-siege" is defined as to surround or block with armed forces, often for a prolonged period, as a means of capturing or obtaining surrender. The opposite of besiege is to liberate, which means to set free or release from bondage or confinement. Another antonym of besiege is to retreat, which means to withdraw or move backward from a confrontational situation. Yet another antonym is to free, which means to release from captivity or bondage. Lastly, an antonym of besiege is to aid, which means to provide assistance or support to someone or something in need.