資料來源 : pyDict

不感謝的,不感恩的,不知感謝的

資料來源 : WordNet®

unthankful
     adj : not feeling or showing gratitude; "ungrateful heirs"; "How
           sharper than a serpent's tooth it is / To have a
           thankless child!"- Shakespeare [syn: {ungrateful}, {thankless}]
           [ant: {grateful}]