aspersions

Why did he cast aspersions upon us?

他为什么要中伤我们?

I do not wish to cast aspersions on your honesty.

我想污蔑你的诚实。

I don't think anyone is casting aspersions on you.

我认为没有人在中伤你。

I don't permit you to cast aspersions on my friend.

我许你诽谤我的朋友。