不明，不清楚
1. unclear, obscure, indistinct, uncertain, ambiguous
noun (common) (futsuumeishi)
adjectival nouns or quasi-adjectives (keiyodoshi)
不知道
2. unknown, unidentified
nouns which may take the genitive case particle 'no'
suffix
3. ignorance, lack of wisdom, lack of insight
noun (common) (futsuumeishi)