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attachment; adhesion; insistence; tenacity; fixation; obsession; clinging (e.g. to old customs)
過去の成功体験に執著すると成長が止まる。
If you cling to past successes, growth will stall.
彼は自分の理論に執著するあまり他の意見を聞かない。
He is so attached to his own theory that he will not listen to other opinions.
些細なことに執著しても時間の無駄だ。
Fixating on trivial matters is a waste of time.