那是一个刻薄的评论。

That was an ___unkind remark.

我没有告诉她真相，因为我认为那会不友善。

I didn't tell her the truth because I thought it would be ___unkind.

他的儿媳对他非常刻薄。

His daughter-in-law was most ___unkind towards him.