1. Capable of being reached only with great difficulty or not at all
   "The unaccessible cave entrance was hidden behind dense vegetation";
   - inaccessible

See also: accessibility, availability, availableness, handiness, out of reach, outback, pathless, remote, roadless, trackless, unapproachable, un-come-at-able, ungetatable, un-get-at-able, unreachable, unreached, untracked, untrod, untrodden