残忍 | cán rěn | cruel / mean / merciless / ruthless | |
无情 | wú qíng | pitiless / ruthless / merciless / heartless | |
峻厉 | jùn lì | pitiless / merciless | |
惨酷 | cǎn kù | (literary) cruel / savage / merciless | |
心狠手辣 | xīn hěn shǒu là | vicious and merciless (idiom) | |
刻薄寡恩 | kè bó guǎ ēn | harsh and merciless (idiom) |