merciless

1. ADJ If you describe someone as merciless, you mean that they are very cruel or determined and do not show any concern for the effect their actions have on other people. 冷酷無情的

...the merciless efficiency of a modern police state. …現代警察國家冷酷無情的傚率。

2. mercilesslyADV 冷酷無情地

We teased him mercilessly. 我們毫不同情地取笑他。