(adj.adv.) : lētālis (lēthāl-), e, adj. id.
* Deadly, fatal, mortal (mostly poet. and late Lat.): vulnus,Verg. A. 9, 580; Suet. Caes. 82: harundo,Verg. A. 4, 73; ensis,Ov. M. 13, 392: serpens, Stat. Th. 6, 40: dapes,Val. Fl. 2, 155: hiems,Ov. M. 2, 827: venenum,Plin. 11. 35, 41, § 118: lac gustasse letale est,id. 11, 41, 96, § 236; Aug. Serm. 351, 5: ferrum,Juv. 15, 165.—In neutr., adverbially, in a deadly manner: letale minari,Stat. S. 4, 4, 84: letale furens,id. Th. 12, 760.—Plur. subst.: lētālĭa, ium, means of death, Liv. 8, 18, 7.—Hence, adv.: lētālĭter, in a deadly manner, mortally, Plin. 11, 37, 81, § 206: vulneratus, Mos. et Rom. Leg. Coll. 2, 7 prooem.

s. TLL