一成不变 (yī chéng bù biàn) | Meaning: (idiom) immutable; impervious to change; set in stone | Chinese Idiom with Pinyin & Origin

(lit.) the original seal has not been disturbed (idiom) · (fig.) left completely unchanged; untouched; intact原封不动yuán fēng bù dòng

constant · unvarying · (math.) invariant不变bù biàn

constant till death · will never change even unto death · changeless至死不变zhì sǐ bù biàn

a pool of stagnant water · stagnant or listless condition一潭死水yī tán sǐ shuǐ

(idiom) immutable; impervious to change; set in stone