Translation guide
The English word 'unforeseen' describes something that was not anticipated or predicted. In Japanese, this concept is expressed through adjectives, verbs, and set phrases that emphasize unexpectedness, lack of prediction, or sudden occurrence. The most common and natural ways to convey 'unforeseen' depend on whether you are describing a situation, an event, or a consequence.
To say that something happened which was not anticipated or predicted, often with a nuance of surprise or lack of preparation.
A formal, written-style adjective meaning 'unexpected' or 'unforeseen'. It directly corresponds to 'unforeseen' and is commonly used in news, reports, and formal speech.
予期せぬ事態が発生した。
An unforeseen situation occurred.
予期せぬ出費に悩まされた。
I was troubled by unforeseen expenses.
An adjective meaning 'unexpected' or 'unforeseen', often with a nuance of something surprising or fortuitous. It can be used in both positive and negative contexts.
思いがけない幸運が訪れた。
An unforeseen stroke of luck came my way.
思いがけない問題が起きた。
An unforeseen problem arose.
A noun meaning 'unforeseen' or 'unexpected', often used in compound phrases like 不測の事態 (unforeseen situation). It is more formal and common in written or official contexts.
不測の事態に備える。
Prepare for unforeseen circumstances.
A noun/adjective meaning 'unexpected' or 'beyond expectations'. It is slightly less formal than 予期せぬ and very common in everyday speech.
予想外の結果になった。
It turned out to be an unforeseen result.
A noun meaning 'outside assumptions' or 'unforeseen', often used in business or technical contexts to describe something not covered by plans or models.
想定外のトラブルが発生した。
An unforeseen trouble occurred.
To stress that an event or outcome was impossible to foresee, often implying no one is at fault.
A phrase meaning 'cannot be foreseen' or 'unforeseeable'. It is used to emphasize the impossibility of prediction.
この結果は誰にも予見できなかった。
This outcome was unforeseen by anyone.
A compound meaning 'unpredictable' or 'impossible to forecast'. It is stronger and more technical than 予見できない.
自然災害は予測不可能なことが多い。
Natural disasters are often unforeseen.
To highlight the abruptness or suddenness of an unforeseen event.
An adverb/adjective meaning 'sudden' or 'abrupt'. While not a direct translation of 'unforeseen', it is often used in contexts where an event was both sudden and unexpected.
突然の訪問に驚いた。
I was surprised by the unforeseen visit.
A noun meaning 'unexpected' or 'sudden', often used in the phrase 不意に (suddenly/unexpectedly). It carries a nuance of being caught off guard.
不意の出来事に対処する。
Deal with an unforeseen event.
予期せぬ is more formal and often used in written or official contexts, while 思いがけない is more conversational and can carry a nuance of surprise or emotional impact. For everyday speech, 思いがけない is usually more natural.
Do not translate 'unforeseen' literally as 見えない (cannot see). This would mean 'invisible' and is incorrect. Use the adjectives and phrases provided.