unsparingly

1. He drove himself unsparingly.
   他强迫自己拚命干。
2. He criticized Zhang Xueliang unsparingly for his nonresistance, rebuking that Zhang should take weighty responsibility for the loss of north-eastern China.
   他毫不留情地批评张学良不抵抗行为，指责他对东三省的丢失负有重大责任。

adv

1. in a scathing and unsparing manner
   1. she criticized him scathingly

   Synonym:    scathingly