cutthroat

竞争激烈的、割喉式的

The smartphone market is cutthroat, and margins keep shrinking every year.

智慧型手机市场竞争激烈，利润每年都在缩水。

残酷无情的、不留情的

He rose to the top using cutthroat tactics that ruined his colleagues.

他靠著毫不留情的手段爬到高层，害惨了同事。

凶手、杀人犯旧式

The alley was said to be full of thieves and cutthroats.

据说那条巷子里满是小偷和杀人犯。