ungraciously

/ʌnˈɡreɪʃəsli/
adverb
  1. In a way that is rude, impolite, or lacking kindness.
    • He ungraciously complained about the gift his grandmother had given him.
    • The guest ungraciously left the party without thanking the host.
    • She ungraciously refused the offer of help without even looking up.
Antonyms