scabies (n.)

skin disease, "the itch," c. 1400, from Latin scabies "mange, itch, roughness," from scabere "to scratch, scrape," from PIE root *(s)kep-, a base forming words meaning "to cut, scrape, hack" (source also of Gothic scaban, Old English sceafan "to scrape, shave;" Greek skaptein "to dig;" "Old Church Slavonic skobli "scraper;" Lithuanian skabus "sharp," skabėti "to cut;" Lettish skabrs "splintery, sharp"). Related: Scabious.