(1) He always mumbles when he's embarrassed.

(2) Her grandmother mumbled in her sleep.

(3) I couldn't understand what he was mumbling about.

(4) I could hear him mumbling to himself.

(5) She mumbled an apology and left.

(6) He bumped into someone and mumbled an apology.

(7) Speak up. Don't mumble!

(8) 'Sorry,' she mumbled.

(9) He mumbled sth. to me but I could not hear what he said.

(10) Outside, mumbling, was one of New York's ever-present crazies.

(11) She mumbled something about being too busy.

(12) "It's all my fault," he mumbled thickly.

(13) 'Today of all days,' she mumbled.

(14) He collapsed on the floor, mumbling incoherently.

(15) From his staff he earned the sobriquet "Mumbles".

(16) He could hear the low mumble of Navarro's voice.

(17) She mumbled that she didn't want to get up yet.

(18) He spoke in a low mumble, as if to himself.

(19) He mumbled something to me which I didn't quite catch.

(20) I wish you wouldn't mumble I can't hear you clearly.

(21) If you're stuck chatting up a mumbler at a cocktail party, lean in with your right ear.