Liars sometimes try to cover up their deed with excessive adjective use.

撒谎者有时候试图用过多的形容词掩盖他们的谎言。

youdao

Naturally his wife will try to cover up for him, so we can't believe everything she says.

他妻子当然会竭力为他掩饰，所以对她讲的话我们不能全都相信。

youdao

It can be used as a metaphor, referring to people who deceive themselves or try to cover up things that can not be concealed.

比喻自己欺骗自己，明明掩盖不了的事情偏要想办法去掩饰。

youdao

They try to cover up weak writing and weak scripts with special effects, but nobody goes to movies for just special effects.

FORBES: Lies, Damned Lies and Piracy

Unfortunately when pensions make costly mistakes, most try to cover them up.

FORBES: Consultant Refuses to Disclose Manager Brokerage to Pension - Asserts Duty to Protect Confidentiality of Its Brokerage Clients! (November 1, 2001)

Such openness is in complete contrast to Saudi Arabia's original response to the problem, which was for many years to try to cover it up or blame it on foreigners.

BBC: NEWS | Middle East | Saudi militants repent 'errors'