tenacity; persistence; obsession
A deep, often unyielding fixation or drive to achieve something, sometimes with a negative or obsessive connotation. Commonly used in phrases like 執念を燃やす (burn with tenacity) or 執念で勝つ (win through sheer persistence).
He tracked down the culprit through sheer tenacity.
The researcher burns with obsession over a single topic.
He is burning with a fierce determination to win the championship.
She got into the top-tier university through sheer tenacity.
He was an athlete who showed unyielding tenacity right to the end.
It was a victory won not by skill but by sheer tenacity.