Lewis Short
(adj.adv.) : mălĭtĭōsus, a, um, adj.malitia
* Full of wickedness, wicked, knavish, crafty, malicious.
* In gen. (class.): homo,Cic. Off. 3, 13, 57: malitiosissimus,Front. ad M. Caes. 4, 3.—Of things: juris interpretatio,Cic. Off. 1, 10, 33.
* As nom. prop.: Silva Malitiosa,a forest in the Sabine territory,Liv. 1, 30, 9; = ὕλη κακοῦργος, Dion. 3, 33. —Hence, adv.: mălĭtĭōsē, wickedly, knavishly, perfidiously: quicquam agi dolose, aut malitiose,Cic. Off. 3, 15, 61: facere aliquid,Cic. Verr. 2, 2, 53, § 132.—Comp.: rem mandatam malitiosius gerere,Cic. Rosc. Am. 38, 111.
Charlton T. Lewis, Charles Short, A Latin Dictionary