This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Lacking weapons or armor; defenseless.

adj. Not carrying, using, or displaying arms: an unarmed spotter plane; unarmed robbery.

adj. Biology Having no thorns, spines, teeth, claws, or other protective parts.

adj. defenceless and lacking weapons or armour

adj. not carrying arms

adj. not having thorns or claws etc.

adj. Not armed or armored; having no arms or weapons.

adj. Having no hard and sharp projections, as spines, prickles, spurs, claws, etc.

adj. Not in a state in which it may be detonated; unable to be detonated; -- used of nuclear and certain other explosive devices, which, as a safety precaution, are stored and transported in a state in which normal triggering mechanisms will not function to cause the device to detonate. The weapon must first be armed by a separate action, and only subsequent to such arming will the weapon be able to detonate.

Not having on arms or armor; not equipped with arms or weapons.

Not furnished with scales, prickles, or other armature, as animals and plants; in entomology, noting parts destitute of projections, spines, points, etc., where such structures are commonly found: as, unarmed tibiæ.

adj. (used of plants or animals) lacking barbs or stings or thorns

adj. (used of persons or the military) not having or using arms

"In the sport, two men would face each other – naked – and battle in unarmed combat."

thornless    spineless    barehanded    clean    defenseless    weaponless    defenceless   

armed   

weaponless    inerm   

unarm   

alarmed    armed    charmed    disarmed    farmed    harmed    unharmed   

defenseless    unprotected    unsuspecting    powerless    disable    helpless    untrained    unprepared    uneducated    unharmed