rasp

From Middle English raspen, from Old French rasper, from Frankish hraspōn, from Proto-Germanic hraspōną, related to Proto-Germanic *hrespaną (“to tear”). Compare Old High German raspōn (“to gather, rake”), Old English ġehrespan (“to tear”). The noun is from Middle French raspe.

Probably from earlier raspis (“raspberry”), mistaken as a plural. Further origin unknown.