mumbly

/ˈmʌmbli/
adjective
  1. Speaking in a low, unclear way, often with the mouth partly closed, so that words are hard to understand.
    • She left a mumbly message on the voicemail that I had to replay three times.
    • His mumbly voice made it hard to follow the story.
    • The old man gave a mumbly reply and shuffled away.
Antonyms
What does "mumbly" mean? | whatsthatwordmean | whatsthatwordmean