形 permanent，lasting，usual，common；名 perseverance，a surname ；

[例句] 我一直在致力于推翻有关意义恒定性的谬谈。 I have been working on exploding the myth of fixity of meaning.

[例句] 不怕无能, 就怕无恒. It's inconstancy, but not inability, that's to be feared.