거뭇거뭇in English:to be dotted with black spots

Examples
with 거뭇거뭇.

• 그 표면은 거뭇거뭇한 점들로 덮여 있다.geu pyomeun-eun geomeutgeomeuthan jeomdeullo deophyeo itda.The surface is covered with black dotted spots.