未み解かい明めい

noun which may take the genitive case particle 'no', na-adjective, noun

unexplained; unsolved; unclear

Used for phenomena, causes, or mechanisms that have not yet been clarified or resolved. Often appears in academic, scientific, or news contexts.

• その病びょう気きの原げん因いんはまだ未み解かい明めいだ。

  The cause of the disease is still unexplained.

• 未み解かい明めいの現げん象しょうについて研けん究きゅうを進すすめている。

  We are conducting research on unexplained phenomena.