brusiti

1. (of a blade) to sharpen; to whet; to hone
   Deda uvek brusi nož pre nego što seče meso. — Grandpa always sharpens the knife before cutting meat.
2. (of a surface) to sand; to grind; to polish
   Majstori ove nedelje bruse parket u dnevnoj sobi. — This week the workers are sanding the parquet in the living room.
   Pre farbanja majstor brusi stare daske. — Before painting, the workman sands the old boards.
3. (of skills) to hone; to polish
   Glumci su mesecima brusili svoje uloge. — The actors spent months polishing their roles.

Perfective partners are «izbrusiti» and «nabrusiti».