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千古不易 (せんこふえき, senkofueki) Japanese meaning | Kotomora
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ある
。
This law of nature is eternally unchanging.
His words contain an immutable truth for all ages.
Related words 万ばん 古こ 不ふ 易えき Similar meaning (eternally unchanging), but uses 万古 (ten thousand ages) instead of 千古 (a thousand ages). Both are yojijukugo with nearly identical usage.
永えい 遠えん 不ふ 変へん Also means eternally unchanging, but is a more modern compound. 千古不易 is more classical and idiomatic.
Etymology A yojijukugo composed of 千古 (a thousand ages, i.e., eternity) and 不易 (unchanging). The exact origin is uncertain, but it follows classical Chinese patterns for expressing timelessness.
