will have been murmuring

• future perfect progressive

  future perfect progressive

  Used to describe a continuous action that will progress up until a designated point of completion in the future.

  of murmur.
  murmur

  noun

  a low, continuous sound, as of a brook, the wind, or trees, or of low, indistinct voices.

Related Words

• babble
• burble
• growl
• gurgle
• hum
• moan
• mumble
• mutter
• purr
• stammer
• utter
• whisper