lallo

āvi, ātum, 1
I. v. n., to sing lalla or lullaby, to sing as a nurse to a child: iratus mammae, lallare recusas, Pers. 3, 17; Hier. Ep. 14, 3: lallare βαβάζειν, Gloss. Philox.
Lewis & Short
A Latin Dictionary, 1879
An open-access project