ADJ-GRADED [usually ADJ n](常指因经历过很多不幸而)冷酷无情的,铁石心肠的 If you describe someone as hard-bitten, you are critical of them because they do not show much emotion or have much sympathy for other people, usually because they have experienced many unpleasant things. (常指因经历过很多不幸而)冷酷无情的,铁石心肠的 [disapproval]