不要拿他的体重开玩笑——这很残忍。

Don't tease him about his weight - it's ___cruel.

孩子们有时会对彼此非常残酷。

Children can sometimes be very ___cruel to each other.

电影中，恐怖分子被描绘得尤为残忍。

In the film, the terrorists are portrayed as particularly ___cruel.