ruthless

adj. /ˈruːθləs/ C1

无情的；残忍的

Hard and cruel, showing no pity or thought for others.

仙境例句

To the Pigeon, every serpent was ruthless: it ate the eggs and never felt sorry.

在鸽子看来，每条蛇都冷酷无情：吃了蛋，从来不觉得抱歉。