to become weak or lose strength or vigor (of health, physical power, intensity); to decline.
風邪をひいてから体が弱っている。
My body has grown weak since catching a cold.
年を取ると視力が弱ってくる人が多い。
Many people’s eyesight weakens as they grow older.
長時間断続的な停電で発電所の出力が弱っている。
The power plant's output has weakened due to repeated long blackouts.
to feel downcast or dispirited; to lose spirit or motivation.
試験に落ちて彼はしばらく弱っていた。
He was down for a while after failing the exam.
失恋で元気をなくし、最近ずっと弱っているようだ。
He lost his energy after the breakup and seems dispirited lately.
長期の残業続きで気持ちが弱っている社員が増えている。
There are more employees whose morale has been worn down by long overtime hours.
to be troubled, at a loss, or irritated; to find oneself unable to cope or unsure what to do.
急な注文変更に現場は弱ってしまった。
The team was at a loss because of the sudden change in the order.
小さな子どもの夜泣きに両親はすっかり弱っている。
The parents are completely worn out and troubled by the child's night crying.
どう断っていいかわからず、彼女はその要求に弱っていた。
She was at a loss about how to refuse that request.