衰弱 shuāiruò weak
weak; feeble
How to remember 衰弱: 衰 weak + 弱 weak = weak.
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How it is used
- To grow weak/feeble, of body or faculties - 身体衰弱 (shēntǐ shuāiruò) become physically weak; 神经衰弱 (shénjīng shuāiruò) neurasthenia.
- Stresses declining from a former stronger state; contrast 虚弱 (xūruò), which describes inherent frailty (often from illness).
- Formal-ish medical register.