abrasive

Short definition from Wiktionary

Adjective

1. 1
   Producing abrasion; rough enough to wear away the outer surface.
2. 2
   Being rough and coarse in manner or disposition; overly aggressive and causing irritation.

Noun

1. 1
   A hard inorganic substance or material consisting in powder or granule form such as sandpaper, pumice, or emery, used for cleaning, smoothing, or polishing.
2. 2
   Rock fragments, sand grains, mineral particles, used by water, wind, and ice to abrade a land surface.