恩知らず

(1)disagreeable; "I will not perform the ungrateful task of comparing cases of failure"- Abraham Lincoln

(2)好みに合わない

(3)not feeling or showing gratitude; "ungrateful heirs"; "How sharper than a serpent's tooth it is / To have a thankless child!"- Shakespeare

(4)謝意を感じない、または示さないさま

(1)