LAMENT is validvalid

to express sorrow or regret for [v LAMENTED, LAMENTING, LAMENTS] : LAMENTABLE [adj], LAMENTABLENESS [n], LAMENTABLY [adv], LAMENTATION [n], LAMENTEDLY [adv], LAMENTER [n]

22,812 of 196,601 in NWL2023·also valid in CSW24

to cry out in grief [v -ED, -ING, -S]