the state or quality of lasting or remaining unchanged indefinitely. "the clarity and permanence of the dyes"
noun [专属名词] 永久（性），持久（性）
The spoken word is immediate but lacks permanence. 口头之言便捷，但缺乏持久性。
per(始终) + man(拿住) + ence → 始终拿着 → 永久， 持久
