whitewash

Cover up a misdemeanor, fault, or error.

“Let's not whitewash the crimes of Stalin”

Cover with whitewash.

“whitewash walls”

Exonerate by means of a perfunctory investigation or through biased presentation of data.

A defeat in which the losing person or team fails to score.

A specious or deceptive clearing that attempts to gloss over failings and defects.

Wash consisting of lime and size in water; used for whitening walls and other surfaces.