moan

n. 1 long murmur expressing physical or mental suffering or pleasure. 2 low plaintive sound of wind etc. 3 colloq. Complaint; grievance. v. 1 make a moan or moans. 2 colloq. Complain, grumble. 3 utter with moans.  moaner n. [old english]

v. i. To make a low prolonged sound of grief or pain, whether articulate or not; to groan softly and continuously.