Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
praevĭus, a, um, adj. [prae-via], going before, leading the way (poet.): praevius Aurorae, Solis Noctisque satelles, Cic. Arat. ap. Non. 65, 9: nunc praevius anteit, Ov. M. 11, 65: praevia luci Pallantias, id. ib. 15, 190; Stat. Th. 4, 485: cui (luci) praevius est sol, Aus. Idyll. Monosyllab. 12; Lact. 4, 24, 8; Amm. 14, 11, 18.