Lewis & Short

pervĭus, a, um, adj. [per-via], that has a passage through; hence,

  1. I. Lit., that may be passed through or crossed, affording a passage through, passable, pervious (class.): aedes, Ter. Ad. 5, 7, 14: transitiones, thoroughfares, passages, Cic. N. D. 2, 27, 67: hostes saltus pervios ceperant, Liv. 9, 43: usus Tectorum inter se, Verg. A. 2, 453: Phoebo non pervia taxus, i. e. impervious to the sun’s rays, Luc. 6, 645: pervius hastis, id. 2, 310: rima pervia flatibus, Ov. M. 15, 301: non ulli pervia vento, id. ib. 2, 762: equo loca pervia, id. ib. 8, 377: Baianae pervia cymbae stagna, Juv. 12, 80: unde maxime pervius amnis, is most fordable, Tac. A. 12, 12: Phasis pontibus CXX. pervius, Plin. 6, 4, 4, § 13: sacraria Fauni pervia, i. e. accessible to all, not set apart by consecration, Calp. Ecl. 1, 15.
    Hence, subst.: pervĭum, ii, n., a thoroughfare, passage: ne pervium illa Germanis exercitibus esset, Tac. H. 3, 8.
    1. B. Transf.
      1. 1. Act., that makes a passage through, penetrating: ensis, Sil. 10, 249.
      2. 2. Pass., perforated, pierced: anulus, Fab. Pict. ap. Gell. 10, 15, 6.
  2. II. Trop.: cor meum mihi nunc pervium est, my heart is now open, i. e. light or easy, Plaut. Ps. 2, 4, 70 (760 Ritschl): nihil ambitioni pervium, accessible, Tac. A. 13, 4.