'Covered' in the Bible

But the gate of the fountain repaired Shallun the son of Colhozeh, the ruler of part of Mizpah; he built it, and covered it, and set up the doors thereof, the locks thereof, and the bars thereof, and the wall of the pool of Siloah by the king's garden, and unto the stairs that go down from the city of David.

Let not their wrongdoing be covered or their sin washed away from before you: for they have made you angry before the builders.

On the twenty-fourth day of this same month the Israelites assembled; they were fasting and wearing sackcloth, their heads covered with dust.