Many continue to grumble that the new law has no master plan for reducing costs.
From the sacbee.com
You know you're a city of the arts, some grumble, when you don't have to say so.
From the pe.com
By the time I was middle-aged, my mother used to grumble at me to stop mumbling.
From the economist.com
Company taxation has been cut-although small firms grumble at having missed out.
From the economist.com
Farmers grumble that their margins are so low that a bad year can bankrupt them.
From the economist.com
People grumble openly about corruption and rising prices as subsidies disappear.
From the economist.com
Yet few will grumble as the number and scope of international rankings mushroom.
From the economist.com
Europeans often grumble that the European Union is run by anonymous apparatchiks.
From the time.com
The French may grumble about Hollywood's hegemony, but they are sensible hosts.
From the time.com
More examples
Rumble: a loud low dull continuous noise; "they heard the rumbling of thunder"
Grouch: show one's unhappiness or critical attitude; "He scolded about anything that he thought was wrong"; "We grumbled about the increased work load"
A complaint uttered in a low and indistinct tone
Murmur: make complaining remarks or noises under one's breath; "she grumbles when she feels overworked"
To utter or emit low dull rumbling sounds; "he grumbled a rude response"; "Stones grumbled down the cliff"
The S-300 is a series of Russian long range surface-to-air missile systems produced by NPO Almaz, all based on the initial S-300P version. The S-300 system was developed to defend against aircraft and cruise missiles for the Soviet Air Defence Forces. ...
A low thundering, rumbling or growling sound; The sound made by a hungry stomach; A complaint; To make a low, growling or rumbling noise, like a hungry stomach or certain animals; To complain; To utter in a grumbling fashion
(grumbled) the past tense of "grumble", which means to complain sadly.