Na-adjective (keiyodoshi), Nounincomprehensible; mysterious; inexplicable; inscrutable; enigmatic; baffling

Noun which may take the genitive case particle 'no', Na-adjective (keiyodoshi), Noununsolved; unresolved; unsettled; pending; outstanding

I-adjective (keiyoushi)hard to understand; incomprehensible; unintelligible

Godan verb with 'ru' ending, Intransitive verbto understand; to comprehend; to grasp; to see; to get; to follow · to become clear; to be known; to be discovered; to be realized (realised); to be found out; to make sense · I know!; I think so too!

Godan verb with 'ku' ending, Transitive verbto untie; to unfasten; to unwrap; to undo; to unbind; to unpack · to unsew; to unstitch · to solve; to work out; to answer