The words that are antonyms for the term "most garrisoned" are 'unarmed', 'unmilitarized', and 'unfortified'. The term 'most garrisoned' suggests a place or structure that is heavily guarded and protected by military forces or security personnel. The antonyms imply the opposite, which means a place that lacks defense, security, military presence, and weaponry. A place that is unarmed, unmilitarized, and unfortified leaves itself open to attack or invasion. Though well-garrisoned places are generally secure, they can also be viewed as threatening or oppressive, and the concept of unarmed, unmilitarized, and unfortified locations is more suitable for a peaceful existence.