in·grate /ˈɪnˌgret/ 不知恩情,忘恩者(a.)不知恩的,忘恩的
In·grate a. Ingrateful. [Obs. or Poetic]
In·grate, n. An ungrateful person. ◄ ►
ingrate n : a person who shows no gratitude [syn: thankless wretch, ungrateful person]