Lewis Short
(adjective) : contentĭōsus, a, um, contentio
* Pertaining to contention, contentious, disputatious, headstrong, obstinate, pertinacious (mostly post-class.): contentiosa et pugnax oratio,Plin. Ep. 2, 19, 4: jurisdictio,Dig. 1, 16, 2.—Comp.: quid contentiosius, quam, etc.,Aug. Ep. 174: pernicies,obstinate,App. M. 8, p. 202, 23.—Adv.: con-tentĭōsē, pertinaciously, obstinately: dicere,Hier. ad Jovin. 2, 10.—Comp.: loqui,Quint. Decl. 18, 6.—Sup., Aug. Civ. Dei, 20, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary