+6 = 9 

ㄏㄣˇhěn

  1. 痛苦下定決心下心不管。」

  1. 凶惡殘忍狠毒」、心狠手辣」。喻世明言·○·相會出師表》:為人但有些小博聞強記。」

ruthless, fierce, ferocious, determined, to harden (one's heart)​, old variant of 很[hen3]
cruel, féroce, résolument
grausam, hartherzig, unbarmherzig (Adj)​