Translation guide
The English adverb 'eternally' expresses an action or state that continues forever, without end. In Japanese, this concept is typically conveyed through adverbs, idiomatic phrases, or grammatical patterns that emphasize permanence, endlessness, or an unchanging state.
Expressing that something will last or continue for all time, without end.
The most direct and common translation for 'eternally'. Used in both spoken and written Japanese to mean 'forever' or 'for eternity'. Suitable for neutral to formal contexts.
Love lasts eternally.
His name will be remembered eternally.
Similar to 永遠に, but often implies a more physical or tangible permanence, like something lasting indefinitely. Common in both casual and formal settings.
This building will remain eternally.
A very common, natural phrase meaning 'forever' or 'for all time'. Often used in emotional contexts, promises, or everyday speech. Slightly more casual than 永遠に.
I'll love you eternally.
May this happiness continue eternally.
A more literary or formal phrase meaning 'for all eternity' or 'forever and ever'. Often used in written language, speeches, or dramatic contexts.
This lesson will be passed down eternally.
Describing an action or state that goes on endlessly, without interruption.
Means 'incessantly' or 'without a break'. Used for actions that continue without pause, often with a nuance of tirelessness.
He worked eternally without rest.
The waterfall eternally pours down water.
Implies something continuing for an excessively long time, often with a negative or tedious connotation. Can be used for speeches, meetings, or repetitive actions.
The meeting went on eternally.
Means 'always' or 'constantly'. While not strictly 'eternally', it can convey a sense of perpetual state or action in many contexts.
Used informally to exaggerate that something feels like it lasts forever, often due to boredom or impatience.
Both mean 'eternally', but 永遠に (eien ni) is more abstract and often used for concepts like love, memory, or spiritual eternity. 永久に (eikyuu ni) tends to refer to physical or tangible permanence, like structures or objects lasting forever. In many contexts they are interchangeable, but 永遠に is more common in emotional expressions.
English often uses 'eternally' in hyperbolic or figurative senses (e.g., 'eternally grateful'). In Japanese, directly translating with 永遠に may sound overly dramatic or unnatural. Instead, use phrases like いつまでも (itsumademo) or 心から (kokoro kara) for 'eternally grateful' → いつまでも感謝しています.
I will be eternally grateful for your help.
Using いつまでも sounds more natural than 永遠に in this context.
The universe is eternally expanding.
Scientific context; 永遠に is appropriate.
彼は常に笑顔だ。
He is eternally smiling.
The waiting time felt eternal.