noun
attachment; tenacity of purpose
Refers to a strong emotional clinging or fixation, often with a nuance of stubborn persistence. Can be used for unhealthy obsession or determined focus depending on context.
彼はお金に対する執着心が強い。
He has a strong attachment to money.
執着心を捨てれば、もっと楽に生きられる。
If you let go of your attachments, you can live more easily.
固執 means stubbornly sticking to one's opinion or course of action, while 執着心 is more about emotional clinging to people, things, or desires.
Compound of 執着 (attachment, fixation) and 心 (heart, mind). The exact historical derivation is uncertain, but the combination naturally expresses a mental or emotional state of clinging.