Correct

捂盖子

/ wǔ gàizi /
Strokes

Definition

cover the lid

Example

As a Verb

keep the lid on—try to cover up the truth (about a crime, etc); conceal

1
gàizi
盖子
zhǐnéng
只能
méng
蒙蔽
shí

By covering up the truth, you can only fool people for the moment.