Whitewash
WHITEWASH, noun [white and wash.]
1. A wash or liquid composition for whitening something; a wash for making the skin fair.
2. A composition of lime and water, used for whitening the plaster of walls, etc.
WHITEWASH, verb transitive
1. To cover with a white liquid composition, as with lime and water, etc.
2. To make white; to give a fair external appearance.