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

A low prolonged sound, articulate or not, indicative of pain or of grief; a low groan.

indicate pain, discomfort, or displeasure; "The students groaned when the professor got out the exam booklets"; "The ancient door soughed when opened"

To emit a sound like moan; -- said of things inanimate; as, the wind moans.

A low mournful or murmuring sound; -- of things.

To bewail audibly; to lament.

To afflict; to distress.

John Holmes' moustache

an utterance expressing pain or disapproval