The crossword solution for the term COMPLETELY STUMP is STYMIE, which is a six-letter word. STYMIE is a verb that means to thwart or impede someone's progress or plans. It is derived from the Scottish game of golf, where a player's ball is blocked by another player's ball, thus preventing them from making a shot. In modern usage, it is often used to describe a situation in which someone is completely stumped and unable to move forward.