a low, mournful cry of pain, sorrow or pleasure

(transitive, now rare) To complain about; to bemoan, to bewail; to mourn.

(intransitive, now chiefly poetic) To grieve.

(intransitive) To make a moan or similar sound.

(transitive) To say in a moan, or with a moaning voice.

(intransitive, colloquial) To complain; to grumble.

(transitive, obsolete) To distress (someone); to sadden.