noun
deep-seated grudge; rancor; spite
A formal, literary yojijukugo expressing a long-held, bitter resentment. Often used in historical or dramatic contexts.
彼は意趣遺恨から復讐を誓った。
He swore revenge out of deep-seated rancor.
その争いは単なる意見の相違ではなく、意趣遺恨によるものだった。
The dispute was not a mere difference of opinion but stemmed from a long-held grudge.
A yojijukugo composed of 意趣 (spite, ill will) and 遺恨 (lasting grudge). The exact historical derivation is uncertain, but the combination reinforces the idea of deep, lingering resentment.