| 动 〈口〉 need or exert great effort; be strenuous: |
| | 安装这台机器真费劲儿。 It really took a lot of effort to install this machine. |
| | 这山越往上爬越费劲儿。 The higher we went up the mountain, the more strenuous the climb became. |
| | 他看英文参考书一点儿不费劲儿。 He can read reference books in English without difficulty. |
| | 我在这件事上已经费了好大的劲。 I have already spent a great deal of effort on this matter. |
