unforgiving
同义词：
inexpiable | stony | intolerant | merciless | pitiless | remorseless | vindictive | ruthless | callous | unmoved | demanding | exacting | taxing | challenging | hard | difficult | unrelenting | grim | relentless | stern | inexorable | unappeasable |
反义词：
词义辨析：
同义参见:
inexpiable
stony