whitewash

A lime and water mixture for painting walls and fences bright white.

A complete victory or series of victories without suffering any losses; a clean sweep.

Any liquid composition for whitening something, such as a wash for making the skin fair.

To paint over with a lime and water mixture so as to brighten up a wall or fence.

"The houses looked very bright when they whitewashed the whole neighborhood."

To cover over errors or bad actions.

"In his sermon, the minister didn't try to whitewash over the sins of his church."

To repay the financial debts of (another person).