unreachable

/ʌnˈritʃəbəl/
adjective
  1. Impossible to get to or contact.
    • After the storm, the island was unreachable by boat.
    • He was unreachable by phone during his hike.
    • The mountain peak was unreachable without special equipment.
  2. Impossible to achieve or attain.
    • The goal of perfect happiness is often unreachable.
    • Her unreachable standards made it hard for her to be satisfied.
    • For many, the dream of owning a house seems unreachable.