1.hardhearted; grim; cold-blooded; cruel; flinty; stony; brutal; 2.in cold blood; as cold as marble; (as) hard as (a) flint; with cruel coldness; (as) hard as nails是什么意思_1.hardhearted; grim; cold-blooded; cruel; flinty; stony; brutal; 2.in cold blood; as cold as marble; (as) hard as (a) flint; with cruel coldness; (as) hard as nails在线翻译_英语_读音_用法_例句