Simple past tense and past participle of unequip.(verb)
Having had equipment removed.(adjective)
Lacking the appropriate equipment for a situation.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "unequipped" in a sentence
"Select brings up your menu where you can equip or unequipped items, check your stats, options and quit."
"Carrie and her girlfriends taught us everything we needed to know about how to pull off such dating hurdles as the morning after walk-of-shame and how to spot the 'modelizers' at every cocktail party -- but left us entirely unequipped to know the protocol with sexting."
"The Lords of the Impossible have always been science heroes, mostly, but I think there could be interesting implications if they have an epic fail trying to stop a magical threat that they are simply unequipped to deal with."