unclear; indistinct; obscure; opaque; inarticulate; dim; blurred
彼の発音は不明瞭です。
His pronunciation is unclear.
監視カメラの画像が不明瞭で、特定が難しい。
The surveillance camera image is unclear, making identification difficult.
責任の所在が不明瞭なため、混乱が生じた。
Due to the unclear locus of responsibility, confusion arose.