unrewarding /ˌʌnrɪˈwɔːdɪŋ/

• 1.  

  ADJ（形容词） If you describe an activity as unrewarding, you mean that it does not give you any feelings of achievement or pleasure. 无成就感的

  例：

  ...dirty and unrewarding work.

  ...又脏又没有成就感的工作。