狠劲

你身上 有一股隐忍的 狠劲 儿

(你老师说得没错) ── Previous context

“There's a kind of restrained ruthlessness in you.”

就冲着行凶人将这十万两银票 丢入水里的 狠劲

(看来还是得查查双清戏班) ── Previous context

“Judging by the killer's ruthlessness in throwing over 10,000 taels of silver bills into the water,”

他身上有一种 隐忍的 狠劲 儿

(对敌人) ── Previous context

“he keeps a hidden ruthlessness.”