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.
The cause of the disease is still unexplained.
We are conducting research on unexplained phenomena.
未解決 focuses on a problem or case that remains unresolved, whereas 未解明 stresses the lack of explanation or understanding.
Compound of 未 (mi, 'not yet') + 解明 (kaimei, 'clarification, elucidation'). The word follows a standard Sino-Japanese pattern for 'not yet ~ed'.