怨おん敵てきおんてきMeanings1nounsworn enemy; mortal foeA strong, often dramatic term for a deeply hated enemy, carrying a sense of grudge or vengeance. Common in historical or literary contexts.彼かれは私わたしの怨おん敵てきだ。He is my sworn enemy.Expressions怨おん敵てき退たい散さんinvoking disaster upon one's mortal enemy; Confusion to the enemy!