永えい久きゅう

え

い

きゅ

う

Meanings

noun, na-adjective, noun which may take the genitive case particle 'no'

Used for something lasting forever or indefinitely. Can be used as a noun, na-adjective, or no-adjective.

この世せ界かいに永えい久きゅうの平へい和わは訪おとずれるのだろうか。

Will eternal peace ever come to this world?

彼かれは永えい久きゅうにこの街まちを去さった。

He left this town forever.

Eikyū era (1113.7.13-1118.4.3)

historical term

Historical Japanese era name. Rarely used outside historical contexts.

永えい久きゅうに〈動どう詞し〉to do something forever / permanently
彼かれはその約やく束そくを永えい久きゅうに守まもると誓ちかった。
He swore to keep that promise forever.
〈事こと〉は永えい久きゅうに続つづくsomething goes on forever / never ends
そんな幸しあわせが永えい久きゅうに続つづくわけはない。
Happiness like that can't possibly last forever.

永えい遠えんN3sense 1
永遠 is the more common, poetic word for abstract eternity, while 永久 stresses literal permanence or unending duration, often of physical or institutional things.
恒こう久きゅうN1sense 1
恒久 is a formal, often political term (as in 恒久平和 'lasting peace'), whereas 永久 is the general-purpose word for permanence in everyday and technical contexts.
半はん永えい久きゅう的てきN2
永久 means truly eternal or permanent, while 半永久的 describes something meant to last a very long time but not literally forever.
無む期き限げんN1
永久 means 'permanent' or 'eternal', implying something lasts forever, whereas 無期限 just means no end date has been set, without necessarily implying it will never end.

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不ふ変へんN1
不変 focuses on the unchanging quality of something, while 永久 emphasizes that it will last forever in time.
永えい代たい
永久 means 'permanent, forever' and is used broadly (永久歯, 永久保存), whereas 永代 is narrower and tied to formal or ceremonial contexts such as temple services or land tenure.
悠ゆう久きゅう
永久 means 'permanence' or 'everlasting' and is used in technical or concrete contexts (e.g., 永久保存), whereas 悠久 carries a poetic, grand-scale nuance.

一いち時じN4sense 1
一時 means 'temporary' or 'for a moment', the direct opposite of 永久's sense of something lasting forever.

永えい住じゅうN1sense 1
永住 specifically means 'permanent residence' (living somewhere permanently), while 永久 is the broader abstract noun for permanence or eternity in general.

Compound of 永 (long, eternal) and 久 (long time). The reading is on'yomi.

長ちょう久きゅう

永久 is a widely used, neutral word for 'forever/permanent', whereas 長久 is confined to formal or set literary expressions.

永えい久きゅう不ふ変へん

eternal and unchanging; permanence

permanent preservation; keeping forever

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永えい久きゅう保ほ管かん
permanent storage
永えい久きゅう公こう債さい
perpetual bond
永えい久きゅう凍とう土ど
permafrost
永えい久きゅう凍とう結けつ
permanent suspension; permanent ban
永えい久きゅう失しっ格かく
permanent disqualification; lifetime ban
永えい久きゅう就しゅう職しょく
marrying to become a housewife; permanent employment as a housewife
永えい久きゅう機き関かん
perpetual motion machine