thankless
adj. 不感谢的；忘恩的；吃力不讨好
副词：thanklessly 名词：thanklessness
近义词：unappreciated，difficult，unrewarding，trying，unacknowledged，ungratifying，unthankful，ungrateful，
英英释义
Adjective
- not feeling or showing gratitude;
"ungrateful heirs" "How sharper than a serpent's tooth it is / To have a thankless child!"
- not likely to be rewarded;
"grading papers is a thankless task"
例句
用作形容词(adj.)
- Giving advice is usually a thankless act.进忠告通常是一种不令人感激的行为。
- I did much for him but what I got was only his thankless complaints.我为他做了那么多，但得到的只是他不知感恩的抱怨。
- She played a thankless role.她扮演了一个受累不讨好的角色。
- They seldom labour their wits on thankless task.他们很少为吃力不讨好的工作动脑筋。