un ‧ grate ‧ ful /ʌnˈɡreɪtf ə l/ BrE AmE adjective
[ Word Family: noun : ↑ gratitude ≠ ↑ ingratitude , ↑ ingrate ; adverb : ↑ gratefully ; adjective : ↑ grateful ≠ ↑ ungrateful ]
not expressing thanks for something that someone has given to you or done for you:
Don’t be so ungrateful!