Ingrateful
Ingrateful , adjective
[Latin ingratus ingrateful (pref. in- not + gratus beloved, dear, grateful) + -ful: compare French ingrat. See Grateful.]
1.
Ungrateful; thankless; unappreciative. — Milton
He proved extremely false and ingrateful to me.
2.
Unpleasing to the sense; distasteful; offensive.
He gives... no ingrateful food.