To make a groan.
To seemingly creak under the strain of being heavily laden.
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.
To (inhale and) exhale; to breathe.
To take up oxygen and produce carbon dioxide through oxidation.
To breathe in and out successively.
To recover one's breath or breathe easily following stress.