ruthless

The ruthless businessman fired hundreds of loyal employees just to increase the company's stock price.

(Chinese) 那个冷酷无情的商人为了提高公司股价，解雇了数百名忠诚的员工。

To win the championship, the athlete adopted a ruthless training schedule that left him no time for family.

(Chinese) 为了赢得冠军，这位运动员采取了冷酷的训练计划，使他完全没有时间陪伴家人。