hands-down

The phrase 'hands-down' originates from the world of horse racing in the mid-19th century. It described a jockey who was winning so easily that he could relax his grip on the reins and lower his hands, a clear sign of an effortless, certain victory. This vivid literal image from the racetrack was then metaphorically extended to describe any contest or competition won with overwhelming ease. Over time, its usage broadened further to function as both an adjective meaning 'easy' or 'certain' and an adverb meaning 'unquestionably', solidifying its place in general English vocabulary.

This is a fixed adverbial phrase and adjective formed from the plural noun 'hands' and the adverb 'down'. It functions as a lexicalized compound.