Not clear or distinct; ambiguous or obscure; hard to understand or see clearly.
説明が不明瞭だったので、もう一度詳しく聞いた。
The explanation was unclear, so I asked for more details.
暗い部屋では字が不明瞭で読めないことがある。
In a dark room the writing can be indistinct and unreadable.
彼の発言は不明瞭で、聞き手に誤解を与えた。
His remarks were unclear and caused the listeners to misunderstand.