The Collaborative International Dictionary of English v.0.48:
Unarm \Un*arm"\, v. t. [1st pref. un- + arm.] To disarm. --Sir T. Browne. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Unarm \Un*arm"\, v. i. To put off, or lay down, one's arms or armor. "I'll unarm again." --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
unarm v 1: take away the weapons from; render harmless [syn: disarm, unarm]