Source : Webster's Revised Unabridged Dictionary (1913)

Unarm \Un*arm"\, v. t. [1st pref. un- + arm.]
   To disarm. --Sir T. Browne.

Unarm \Un*arm"\, v. i.
   To puff off, or lay down, one's arms or armor. ``I'll unarm
   again.'' --Shak.

Source : WordNet®

unarm
     v : take away the weapons from; render harmless [syn: {disarm}]