I. ˈsan(d)ˌpāpə(r), ˈsaan- noun
Etymology: sand (I) + paper
: paper covered on one side with sand or other abrasive material glued fast and used for smoothing and polishing — compare garnet paper
II. transitive verb
( sandpapered ; sandpapered ; sandpapering -āp(ə)riŋ ; sandpapers )
: to rub with or as if with sandpaper
boards are planed and sandpapered until perfectly smooth — Madge Reese
the sharp edges of his temper had been sandpapered down by success — Malcolm Cowley