unsparingly
adverb /ʌnˈspeərɪŋli/
  /ʌnˈsperɪŋli/
(formal)- without caring about people's feelings无情的;严厉的 - He has been unsparingly critical of the quality of other scientists' work. 他一直毫不留情地批评其他科学家的工作质量。 
 
- He has been unsparingly critical of the quality of other scientists' work. 
- in a very generous way慷慨的;大方的;不吝啬的 - an unsparingly generous hostess慷慨大方的女主人 
 compare sparingly
- an unsparingly generous hostess