to crackle, as crepitant lungs do, as some arthritic joints may do, or as some fractured bones may do.
To seemingly creak under the strain of being heavily laden.
To make a groan.
A low, mournful sound uttered in pain or grief.
A low, guttural sound uttered in frustration, disapproval, or ecstasy.
A low creaking sound from applied pressure or weight.