• 執とる — to take; to handle; to hold
• 執念しゅうねん — tenacity; dogged persistence
• 固執こしつ — stubborn adherence; insistence
• 執筆しっぴつ — writing; authorship
• 執行しっこう — execution; enforcement
• 執務しつむ — official duties; clerical work
• 執刀しっとう — performing surgery (as the operating surgeon)

執 depicts the idea of grasping firmly and by extension “holding to” a task, view, or duty. This core sense explains words like 執る (to take/handle), 固執 (to cling to), and 執念 (tenacious resolve).