万ばん古こ不ふ易えきばんこふえきじ字FuriganaMeanings1nouneternally unchanging; immutableyojijukugo (four-character idiom)›A yojijukugo meaning something that remains unchanged for all eternity. Often used in formal or literary contexts to describe principles, truths, or natural laws.自し然ぜんの摂せつ理りは万ばん古こ不ふ易えきである。