mumbling

he was mumbling something under his breath about the weather.

i could barely hear him mumbling instructions to the team.

she was mumbling incoherently after waking up from a nap.

the child was mumbling a song to himself while playing with toys.

stop mumbling and tell me what you want!

he was mumbling apologies after accidentally bumping into her.

i tried to ask him a question, but he just kept mumbling.

the old man was mumbling to himself as he walked down the street.

she accused him of mumbling secrets to his friends.

he was mumbling about the complicated rules of the game.

the professor was mumbling about obscure historical facts.