ph.

1. (用…)盖在…上(以保护或隐藏)
If you cover something or someone up, you put something over them in order to protect or hide them.

2. 隐藏，遮掩(事实)
If you cover up something that you do not want people to know about, you hide the truth about it.

1. hide from view or knowledge

e.g. The President covered the fact that he bugged the offices in the White House

Synonym: cover