恒こう性せいこうせいじ字FuriganaMeanings1nounconstancy; invariability; permanenceAbstract noun referring to the quality of being constant, unchanging, or permanent. Often used in philosophical, scientific, or formal contexts.自し然ぜん法ほう則そくの恒こう性せいは科か学がくの前ぜん提ていである。