cruel

The dictator was notorious for his cruel treatment of political prisoners and their families.

(Chinese) 这位独裁者因残忍对待政治犯及其家属而臭名昭著。

Leaving a pet locked in a hot car without water is a cruel act of negligence.

(Chinese) 把宠物关在没有水的闷热车内是一种残忍的疏忽行为。