People who are unkind or uncaring can be described as meaner than a junkyard dog.

VOA: special.2010.05.30

I don't know how to evaluate everything Icahn has done but some corporate raiders have been unkind to employees.

我不清楚如何评估伊坎,做过的所有的事情，但是一些公司蓄意收购者,一直以来对雇员都不友善。

耶鲁公开课 - 金融市场课程节选

The message of the flood story also seems to be that when humans destroy the moral basis of society, when they are violent or cruel or unkind, they endanger the very existence of that society.

而洪水所表达的信息是,当人类毁掉了社会的道德根基，当人类变得暴力，残忍，这都会危及到人类社会的存在。

耶鲁公开课 - 旧约导论课程节选

It is about an extremely unkind man called the Grinch.

VOA: special.2010.05.02

Surely it is unkind not to cry for the dead.

VOA: special.2009.10.31