MOAN is validvalid

to utter a low, mournful sound [v MOANED, MOANING, MOANS] : MOANER [n], MOANINGLY [adv]

3,550 of 196,601 in NWL2023·also valid in CSW24

to utter a low, mournful sound, also MEANE, MEIN, MENE [v -ED, -ING, -S]