mumbled

/M AH1 M B AH0 L D/
verb
  1. 1

    To speak unintelligibly or inaudibly; to fail to articulate.

    โ€œPlease try not to mumble so I can hear you better.โ€

  2. 2

    To chew something gently with closed lips.

Source: https://en.wiktionary.org/wiki/mumble, https://en.wiktionary.org/wiki/mumbled