hau

hau (also au), interj., an exclamation of pain or grief,

Oh! ah! au, nullan tibi lingua'st? Plaut. Stich. 1, 3, 104; id. Cist. 3, 15; Ter. And. 751; 781; id. Eun. 656; id. Heaut. 1015; id. Ad. 336; id. Phorm. 754 et saep.