ingratitude
🇺🇸
/ɪnˈɡrætɪtuːd/
🇬🇧
/ɪnˈɡrætɪtjuːd/
A lack of gratitude or appreciation for something done or received.
It was a sign of ingratitude when he didn't thank her for the gift.
這是忘恩負義的表現,因為他沒有為禮物而感謝她。