To complain in a thin, peevish, or fretful way

• To speak in an irritating, high-pitched tone while complaining

To utter a high-pitched, wavering cry

• To make a thin, prolonged sound like that cry

A high-pitched, complaining cry or sound

• A thin, prolonged noise from a person, animal, or machine

A petty or tiresome complaint

• An instance of trivial grumbling