- 根本性 gēnběnxìng fundamentalof fundamental importance; basic; radical
- 本性难移 běnxìngnányí nature is hard to changeIt is hard to change one's essential nature; a proverb meaning a person's character remains the same
- 江山易改，本性难移 jiāngshānyìgǎiběnxìngnányí you can't change who you are(idiom) it is easier to change mountains and rivers than to alter one's character; used to emphasize that a person's nature is deeply rooted and difficult to change
