raspar
scrape
rasp
to scrape with a rough tool
+
-ar
verb infinitive ending
Raspar means to scrape and can be thought of as rasp0 (to scrape with a rough tool0) + -ar1 (verb infinitive ending1).
verb
  1. scrape
    To scrape or grate a surface
    Necesito raspar la pintura vieja antes de pintar la pared. // I need to scrape off the old paint before painting the wall.