万古不易

ばんこふえき

eternally unchanging

万世不易

ばんせいふえき

eternity, perpetuity

万代

ばんだい まんだい よろずよ

thousands of years, eternity, all generations

不易

ふえき

constancy, immutable

千代万代

ちよよろずよ

for ever and ever, (through) eternity, countless ages, till the end of time

万代草

ばんだいそう バンダイソウ

houseleek (any plant species of genus Sempervivum)

万劫末代

まんごうまつだい

eternity, through all eternity, for evermore, for many generations to come

千古不易

せんこふえき

eternally unchanging

不易流行

ふえきりゅうこう

the principle of fluidity and immutability in haiku, Haiku is both "fluid and transitory" and "eternal and immutable.", An interchange between the transient and the immutable is central to the soul of haiku. (Basho)

不埒千万

ふらちせんばん

very insolent, extremely audacious, reprehensible

万夫不当

ばんぷふとう

being a match for thousands, being a mighty warrior (combatant)

不届千万

ふとどきせんばん

very rude, very insolent, extremely reprehensible, outrageous

不遇時代

ふぐうじだい

one's dark days, the period during which one suffered misfortune and obscurity

不届き千万

ふとどきせんばん

very rude; very insolent; extremely reprehensible; outrageous

不定代名詞

ふていだいめいし

indefinite pronoun

代替不可能

だいたいふかのう

non-substitutable; irreplaceable; unique; non-fungible

易

えき い

easiness

万万一

ばんばんいち まんまんいち

by any chance, ten thousand to one

万

まん よろず ばん

(まん) ten thousand