Source : Webster's Revised Unabridged Dictionary (1913)

Rasp \Rasp\, v. t. [imp. & p. p. {Rasped}; p. pr. & vb. n.
   {Rasping}.] [OF. rasper, F. r[^a]per, to scrape, grate, rasp,
   fr. OHG. rasp[=o]n to scrape together, to collect, probably
   akin to E. rap. Cf. {Rap} to snatch.]
   1. To rub or file with a rasp; to rub or grate with a rough
      file; as, to rasp wood to make it smooth; to rasp bones to
      powder.

   2. Hence, figuratively: To grate harshly upon; to offend by
      coarse or rough treatment or language; as, some sounds
      rasp the ear; his insults rasped my temper.