Translation guide
The English word 'perpetual' describes something that continues without stopping or occurs repeatedly over a long time. Japanese expresses this idea through various adjectives, adverbs, and phrases depending on whether you mean 'everlasting,' 'constant,' 'endless,' or 'recurring.'
Describing something that lasts forever, never ending, often in a spiritual or poetic sense.
The most common and direct translation for 'eternal' or 'everlasting.' Used for abstract concepts like love, life, or peace.
I vow eternal love.
Similar to 永遠の but often implies permanence or something that lasts indefinitely without change. Slightly more formal or literary.
We wish for perpetual peace.
Means 'imperishable' or 'undying,' often used for fame, achievements, or works of art that will never fade. Literary.
a perpetual masterpiece
Describing an action or state that continues without interruption, often in a negative or annoying context.
Literally 'without a gap,' used for continuous noise, effort, or activity. Very common and natural.
I'm bothered by the perpetual noise.
Describes something that keeps happening without a break, often used for phone calls, visitors, or rain. Slightly colloquial.
The phone rings perpetually.
Adverb meaning 'endlessly' or 'on and on,' often with a nuance of tediousness. Used for speeches, meetings, or complaints.
a perpetual argument
Emphasizing that something has no end in space or time, often used for physical or metaphorical vastness.
Means 'boundless' or 'endless,' often used for journeys, deserts, or efforts. Conveys a sense of vastness.
a perpetual wilderness
Literally 'infinite,' used for possibilities, space, or resources. More mathematical or abstract than 果てしない.
perpetual possibilities
Describing something that happens repeatedly or is a permanent state, like a perpetual student or a perpetual problem.
Using the adverb 常に (constantly) before a verb or adjective to express a perpetual state or habit. Very flexible.
He is perpetually complaining.
Adverb meaning 'all year round' or 'always,' used for habitual actions or states. Casual.
Very casual adverb meaning 'all the time' or 'constantly.' Often used for frequent, sometimes annoying, occurrences.
永遠 (eien) is the most common for 'eternal' in emotional or abstract contexts. 永久 (eikyuu) emphasizes permanence and is often used in technical or formal settings (e.g., 永久歯 permanent teeth). 不朽 (fukyuu) is literary and used for enduring fame or works.
English often uses 'perpetual' as an attributive adjective, but Japanese usually expresses the idea through adverbs or relative clauses. For example, 'perpetual motion' is 永久運動 (eikyuu undou), a set phrase, but 'perpetual noise' is better as 絶え間ない騒音 (taemanai souon).
彼は年中忙しい。
He's perpetually busy.
しょっちゅう遅刻する。
He's perpetually late.