(adjective) : ĭn-accessus, a, um
* Unapproached, unapproachable, inaccessible (cf.: invius, impervius, devius, avius).
* Lit. (poet. and post-Aug.): mare scopulis inaccessum,Plin. 12, 14, 30, § 52: montes,id. 6, 28, 32, § 144; 10, 12, 16, § 34; Flor. 3, 1, 14: aditus,Sil. 3, 516: lucus,Verg. A. 7, 11: spelunca radiis solis,id. ib. 8, 195.
* Trop., unattainable: Pindarus imitationi,Macr. S. 5, 17, 7: formositas,App. M. 4, p. 155.

s. TLL