ˈmɔːndə ˈmɔndɚ ˈmʌmbəl ˈmʌmbəl ˈmʌ.sɪ.teɪt talk indistinctly; usually in a low voice grind with the gums; chew without teeth and with great difficulty the old man had no teeth left and mumbled his food a soft indistinct utterance