cool-looking

The compound adjective 'cool-looking' is a modern English formation that combines two distinct Old English roots. The first element, 'cool', evolved from a Proto-Indo-European root meaning 'cold' and, by the mid-20th century in American slang, developed the figurative sense of 'stylish, sophisticated, or excellent'. The second element, 'looking', derives from a verb meaning 'to see or appear'. When combined, the literal morphemes create the meaning "having the appearance of being stylish or impressive." This compound follows a productive English pattern (adjective + present participle) to describe visual qualities, demonstrating how a word for temperature was semantically extended into the aesthetic and social domain.

Structure: cool (sense) + looking (sense) - cool: From Old English cōl (cool, cold, temperate), from Proto-Germanic kōlaz, from Proto-Indo-European gel- (cold, to freeze). Functions as an adjective root meaning stylish, fashionable, or excellent. - looking: From the present participle of the verb look, from Old English lōcian (to see, gaze, observe), from Proto-West Germanic lōkōn. Functions as a participial suffix meaning "having the appearance of".