Lewis Short
(adj.adv.) : luctĭfĭcus, a, um, adj.id.
* Causing sorrow or lamentation, doleful, woful, baleful: clades, Cic. poët. Tusc. 2, 10, 25: Alecto,Verg. A. 7, 324: pavor,Sil. 6, 557: jubar,Val. Fl. 3, 292.—Neutr. as adv.: luctificum clangente tuba,Val. Fl. 3, 348.
Charlton T. Lewis, Charles Short, A Latin Dictionary