Meaning

adjective lacking refinement or cultivation or taste

originFrom Middle English uncouth, from Old English uncūþ (“unknown; unfamiliar; strange”), from Proto-West Germanic *unkunþ, from Proto-Germanic *unkunþaz (“unknown”), equivalent to un- + couth. The modern pronunciation does not show /aʊ/, the usual development of the Middle English vowel from the Great Vowel Shift. It is usually explained as a pronunciation taken from Northern English dialects, which…

Etymology from Wiktionary, CC BY-SA 3.0