[mum.ble] vb mum.bled ; mum.bling [ME momelen, of imit. origin] vi (14c): to utter words in a low confused indistinct manner: mutter ~ vt 1: to utter with a low inarticulate voice
2: to chew or bite with or as if with toothless gums -- mumble n -- mum.bler n -- mum.bly adj