不 可 解(ふかかい)

ふかかい

na-adjective

mysterious; incomprehensible; puzzling

formalliterarydescriptive

1. mysterious; incomprehensible; puzzling

Something that cannot be understood or explained, despite efforts to make sense of it.

彼(かれ)の行動(こうどう)は不可解(ふかかい)だ。

His behavior is incomprehensible.

不可解(ふかかい)な事件(じけん)が起(お)きた。

A mysterious incident occurred.

なぜ断(ことわ)ったのか不可解(ふかかい)でならない。

I simply can't understand why they refused.

Forms

不(ふ) (un-, in-) + 可(か) (possible) + 解(かい) (understand)
Literally: "impossible to understand"

不可解(ふかかい)な + noun (incomprehensible ~)
不可解(ふかかい)だ (it's puzzling)

Common collocations

不可解(ふかかい)な行動(こうどう) - incomprehensible behavior
不可解(ふかかい)な事件(じけん) - mysterious incident
不可解(ふかかい)な死(し) - mysterious death

Similar words

不思議(ふしぎ) - strange, mysterious (more neutral, can be positive)
不可思議(ふかしぎ) - inexplicable (more literary)
謎(なぞ)めいた - enigmatic, mysterious

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Formal to neutral. Often used in news and serious writing.

Related Words

Synonym: 不可思議(ふかしぎ) (literary)

Compare: 不思議(ふしぎ) (strange, mysterious)

Compare: 謎(なぞ)めいた (enigmatic, mysterious)

Compare: 意味不明(いみふめい) (incomprehensible)

general

Added 2026.1.19 16:22 · Revised 2026.9.2 13:01

07000/07392_fukakai