Tā duì shòuhàizhě háo wú tóngqíng, zhēn shì lěngxuè.
He shows no sympathy for the victims — he's truly cold-blooded.
Tips
usage
Mirrors English 'cold-blooded' on both senses: literal (reptiles) and figurative (callous). Common compounds: 冷血动物 'cold-blooded animal,' 冷血杀手 'cold-blooded killer.'
