noun, noun or participle which takes 'suru'
anguish; agony; mental torment
A yojijukugo expressing deep mental suffering, worry, and distress. Often used in literary or formal contexts.
彼は将来への不安で煩悶懊悩の日々を送っている。
He spends his days in anguish over his future.
煩悶懊悩の末、彼は決断を下した。
After much mental torment, he made a decision.