cover-up
nounUK /ˈkʌvər ʌp/
US /ˈkʌvər ʌp/
A cover-up is when someone hides a mistake so nobody finds out.
The teacher found out about the cover-up when the truth came out.
OTHER MEANINGS
2. Something you wear over other clothes to keep them clean or warm.
She put on a cover-up before painting the wall.
3. A light piece of clothing worn over a swimsuit at the beach.
He wore a cover-up over his swim trunks.
4. The act of putting something over an object to protect or hide it.
The cover-up of the old car kept it dry in the rain.