mid-13c., "to scrape," from Middle Dutch raspen and from Old French rasper (Modern French râper) "to grate, rasp," which is perhaps from a West Germanic source (cf. Old English gehrespan) akin to the root of raffle. Vocalic sense is from 1843. Related: Rasped; rasping.
"coarse file," 1540s, from Middle French raspe (Modern French râpe), from Old French rasper "to rasp" (see rasp (v.)).
["RASP - A Language with Operations on Fuzzy Sets", D.D. Djakovic, Comp Langs 13(3):143-148 (1988)].