(おも)いがけない

おもいがけない
adjective (i)
unexpected; surprising; unforeseen
See also: (おも)いがけず (adverb form)
Conjugation
AffirmativeNegative
Present(おも)いがけない(おも)いがけなくない
Past(おも)いがけなかった(おも)いがけなくなかった
て form(おも)いがけなくて(おも)いがけなくなくて
Adverbial(おも)いがけなく
Conditional ば(おも)いがけなければ(おも)いがけなくなければ
Conditional たら(おも)いがけなかったら(おも)いがけなくなかったら
1. unexpected; surprising; unforeseen
Describes something that happens without being anticipated. Can refer to both positive and negative surprises.
(おも)いがけない出来事(できごと)があった。
Something unexpected happened.
(おも)いがけない場所(ばしょ)友人(ゆうじん)()った。
I ran into a friend in an unexpected place.
(おも)いがけないプレゼントをもらって、とても(うれ)しかった。
I received an unexpected present and was very happy.

Describes something that was not anticipated or imagined beforehand. It conveys genuine surprise at an outcome or encounter that lay outside one's expectations.

FORMS:

  • (おも)いがけない (adjective) — unexpected
  • (おも)いがけなく (adverb) — unexpectedly
  • (おも)いがけず (adverb, slightly literary) — unexpectedly

USAGE:
Primarily used as a modifier before nouns. The adverbial form (おも)いがけず is common in written language and has a slightly formal tone.

RELATED WORDS:

  • 意外(いがい) — unexpected; surprising (na-adjective, more neutral)
  • 突然(とつぜん) — sudden (focuses on timing rather than expectation)