含ふくみ声ごえ

noun

muffled voice; indistinct voice

Describes a voice that is not clear, often because the speaker is mumbling, speaking with something in their mouth, or intentionally suppressing clarity.

• 彼かれは含ふくみ声ごえで何なにか言いったが、聞きき取とれなかった。

  He said something in a muffled voice, but I couldn't catch it.