unkindly       
adverb uk/ʌnˈkaɪnd.li/ us/ʌnˈkaɪnd.li/
 刻薄地;不友善地;不客气地
in a way that does not treat someone very well, or does not consider someone's feelings
  "It makes you look older," she said unkindly. "这个让你看着显老,"她刻薄地说。 
 I don't think he meant it unkindly. 我觉得他没有恶意。 
 See: unkind
 - More examples
 - She spoke frankly, but not unkindly.
 - He treated his old friends unkindly.
 - We both laughed, rather unkindly.