5 letters · 11 points in Scrabble
adjective showing self-interest and shrewdness in dealing with others
adjective characterized by great caution and wariness
originInitially US colloquial, of unknown origin. A connection with the behavior of caged prisoners (wary and closed-lipped) and caged animals (wary) has been speculated. If so, by surface analysis, cage + -y.
Etymology from Wiktionary, CC BY-SA 3.0