scurvy

The adjective is derived from Late Middle English scurvi, scurvy, variants of scurfi (“having scurf, scabby”), from scurf (“skin disease causing scabs or scales; flakes of skin that fall off due to a skin disease, etc.”) + -i (suffix forming adjectives). Scurf is derived from Old English scurf, from Proto-Germanic *skurf- (“to gnaw”), from Proto-Indo-European *(s)ker- (“to cut off, sever; to divide, separate”). By surface analysis, scurf (“skin disease; flakes of skin that fall off due to a skin disease; crust-like formations on the skin”) + -y (suffix meaning ‘having the quality of’ forming adjectives). The noun is derived from the adjective.

出典: Wiktionary「scurvy」（CC BY-SA 4.0）