soot-covered russian

• задыми́ться

  begin to smoke, be blackened with smoke, be covered with soot

• прокопте́лый

  covered with soot, sooty

• зака́пчивавшийся

  getting sooty, becoming sooty, that was getting covered in soot

• закапчиваемый

  being smoked, being covered in soot, being begrimed

• прокопти́вший

  smoked, cured by smoking

  smoky, smoke-filled, soot-covered, smoke-stained