liar

你这个说谎者——我从来没碰过它！

You ___liar - I never touched it!

不要做说谎的人；永远要讲真话。

Don't be a ___liar; always tell the truth.

他就是个骗子——他说的话你一句都不能信。

He's such a ___liar - you can't trust a word he says.