noun
deep-rooted delusion; firm conviction based on false beliefs
Primarily a Buddhist term for a deeply held attachment or delusion that causes suffering. In modern usage, it can refer to an irrational, stubborn belief or obsession.
彼は自分の理論に妄執している。
He is obsessed with his own theory.
妄執を捨てれば心が軽くなる。
If you let go of deep-rooted delusions, your heart will feel lighter.