ichidan verb, intransitive verb
be completely weakened; be utterly exhausted; be worn out
Describes physical or mental exhaustion to the point of being unable to function. Often used when someone is drained by illness, hard work, or worry.
長い闘病生活で、彼はすっかり弱り果てていた。
After a long illness, he was completely worn out.
徹
My body is utterly exhausted from staying up all night.
ichidan verb, intransitive verb
be completely at a loss; be at one's wits' end; be greatly annoyed
Emphasizes mental distress or helplessness in a difficult situation, not physical fatigue. Often used when someone is overwhelmed by problems or irritation.
問題が複雑すぎて、担当者は弱り果てていた。
The person in charge was at his wits' end because the problem was too complicated.
彼のわがままには本当に弱り果てる。
I'm really fed up with his selfishness.