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loathsome

/ˈləʊð.səm/ adjective

Origin

From Middle English lothsum, from Old English *lāþsum, from Proto-West Germanic *laiþasam, equivalent to loath + -some. Cognate with Middle Low German lêtsam (“arduous”), German leidsam (“sad, sorry”).

From Wiktionary, via Kaikki.org (CC BY-SA)