不ふ可か知ち

na-adjective, noun

unknowable; mysterious

Describes something that cannot be known or understood, often in philosophical or abstract contexts. Can also be used more loosely for something deeply mysterious.

• 宇う宙ちゅうの起き源げんは不ふ可か知ちな部ぶ分ぶんが多おおい。

  Many aspects of the origin of the universe are unknowable.

• 彼かれの真しん意いは不ふ可か知ちのままだった。

  His true intentions remained mysterious.