ʿārōm עָרֹם ‘be shrewd’ (Hebrew)

Etymology^?: a primitive root

ʿārōm v
1) to be subtle, be shrewd, be crafty, beware, take crafty counsel, be prudent
 1a) (Qal) to be crafty, be subtle
 1b) (Hiphil) to be crafty, be or become shrewd