[shuāi ruò]
(失去强盛的精力) weak; feeble; fall into a decline; debility; asthenia
suffer from neurasthenia
神经衰弱
The patient is very weak.
病人很衰弱。
He is very weak, for he has been ill for a long time.
他病了很久,身体衰弱。
(事物由强转弱) collapse; traik; frail; weak; slack off; weaken; hyposthenia
The offensive has slacked off.
攻势已经衰弱。