HSK 7-9
乏力
fálì形动
lacking in strength; weak; feeble; not up to the task
长期睡眠不足让他感到乏力。
Cháng qī shuì mián bù zú ràng tā gǎn dào fá lì.
Long-term sleep deprivation left him feeling weak.
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Appears across levels (7-9) in the HSK 3.0 word list.