What is to utter complaints in a low, half-articulated voice; to feel or express dissatisfaction or discontent; to grumble; -- often with at or against. "His disciples murmured at it." John vi called?

murmur — To utter complaints in a low, half-articulated voice; to feel or express dissatisfaction or discontent; to grumble; -- often with at or against. "His disciples murmured at it." John vi. (Webster's 1913.)