in ‧ grate /ɪnˈɡreɪt, ˈɪŋɡreɪt $ ˈɪŋɡreɪt/ BrE AmE noun [countable] formal
[ Word Family: noun : ↑ gratitude ≠ ↑ ingratitude , ↑ ingrate ; adverb : ↑ gratefully ; adjective : ↑ grateful ≠ ↑ ungrateful ]
[ Date: 1400-1500 ; Language: Latin ; Origin: ingratus , from gratus 'grateful' ]
an ungrateful person