Synonyms and related words :
beyond one, beyond reach, closed forever to, closed to, impenetrable, impervious, impracticable, impractical, inaccessible, infeasible, inoperable, insuperable, insurmountable, lost to, out of reach, too much for, un-come-at-able, unaccessible, unachievable, unapproachable, unavailable, uncompassable, undiscoverable, undoable, uneffectible, unfeasible, ungetatable, ungettable, unnegotiable, unobtainable, unperformable, unprocurable, unreachable, unrealizable, unsecurable, unsurmountable, unworkable