thankless
adj
1 not feeling or expressing gratitude 不感谢的; 不领情的; 忘恩的.
2 (of an action) not likely to win thanks, appreciation or reward for the person performing it (指行为)不可能得到感谢、 感激或报偿的
a thankless role, task 受累不讨好的角色、 工作.
🗣️ 情景例句
She'll love it. It's a once-in-a-lifetime offer, Harry.