Lewis Short
(adj.adv.) : prōclīvis, e (ante- and post-class. and poet.; collat. form prōclīvus, a, um, Plaut. Mil. 4, 2, 27; Varr. R. R. 2, 2, 7; Cat. 64, 270; Front. Strat. 2, 2, 2; v. Neue, Formenl. 2, p. 91), adj. proclivus
* Sloping, steep, going downwards or downhill.
* Lit. (rare; not in Cic. or Caes.: solum,Varr. R. R. 2, 2, 7: per proclivem viam duci,Liv. 35, 30: omnia procliva sunt; facile descenditur,Sen. Apoc. 13.—Subst.: prō-clīve, is (or prōclīvum, i), n., a slope, descent, declivity: pelli per proclive,downhill, downwards,Liv. 5, 43, 2: adjuvante proclivo impetum militum,Front. Strat. 2, 2, 2 (al. proclivio): in proclive detrudi, Auct. B. Alex. 76: per proclivia devolare,Col. 9, 5, 1.—Of persons, going downwards or downhill (poet.), Claud. III. Cons. Honor. 178.
* Trop.
* Downwards, descending, downhill, declining (rare but class.): proclivi cursu et facili delabi,Cic. Rep. 1, 28, 44: jam proclivi senectute,declining, drawing to a close,App. Fl. 4, p. 361; cf.: Junius mensis est jam proclivus in Julium,Sen. Ep. 86, 16.—Absol.: proclivi currit oratio,flows precipitately,Cic. Fin. 5, 28, 84; v. Madv. ad h. l.
* Inclined or disposed to a thing, liable, prone, subject; ready, willing (freq. and class.; mostly in a bad sense; cf. Cic. Tusc. 4, 12, 27, s. v. proclivitas; syn. propensus); constr. usually ad aliquid, more rarely with dat. or circa.
* With ad: ingenium Hominum proclive ad lubidinem,Ter. And. 1, 1, 50: ad aliquem morbum proclivior,Cic. Tusc. 4, 37, 81: ergo et invidi et malevoli...quia proclives ad eas perturbationes,id. ib. 4, 12, 28: amicitia debet esse ad omnem comitatem facilitatemque proclivior,id. Lael. 18, 66.
* Steep, unsafe, untrustworthy; and hence, obscure, unintelligible: fecisti modo mi ex proclivo planum,you make it plain,Plaut. Mil. 4, 2, 28: faciam hanc rem planam ex proclivā tibi,id. Rud. 4, 4, 90: nam iste proclive'st quod jubes me plane conlocare,id. As. 3, 3, 73.
* With circa (post-Aug.): eritque judex circa modestiam juris probatione proclivior,Quint. 4, 5, 21.
* Downwards: proclive labuntur,rush downwards,Cic. Tusc. 4, 18, 42 Kühn. and Moser N. cr. (B. and K. proclivi); Lucr. 2, 455 Lachm.; cf. sublime ferri, under sublimis.—Comp.: labi verba proclivius,i. e. more rapidly,Cic. Or. 57, 191; cf.: quin proclivius hic iras decurrat ad acris,Lucr. 3, 311.
* Easily: facile et procliviter persuadere, Castric. ap. Gell. 1, 6, 6.—Comp.: multo proclivius,Lucr. 2, 792.
Charlton T. Lewis, Charles Short, A Latin Dictionary