冷酷 (lěng kù): unfeeling; callous

That boss is very cold and ruthless to his employees; even if someone takes sick leave, he deducts their pay.

In the movie, that cold-blooded killer was finally moved by the little girl's kindness.

He coldly rejected her marriage proposal and didn't even say a word of comfort.

The war made him cold and heartless; he no longer believes in anyone's goodwill.

Under her cold exterior, she actually hides a fragile heart.