godan verb (-ru), 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 stress.
長い病気で彼はすっかり弱り切っていた。
He was completely weakened by the long illness.
徹夜続き
My body is utterly exhausted from consecutive all-nighters.
godan verb (-ru), intransitive verb
be completely at a loss; be at one's wits' end; be greatly annoyed; be fed up
Expresses mental distress, helplessness, or extreme annoyance when facing a difficult situation or persistent trouble. Often used with ～に or ～で to indicate the cause.
問題が難しすぎて、弱り切ってしまった。
The problem was so difficult that I was completely at a loss.
彼のわがままには本当に弱り切る。
I'm really fed up with his selfishness.