unattainable
I
adjective
impossible, impracticable, impractical, inaccessible, infeasible, insuperable, insurmountable, out of reach, out of the question, unachievable, unacquirable, unapproachable, unavailable, unfeasible, ungettable, unobtainable, unperformable, unprocurable, unreachable, unsecurable
II
index
impossibility, impossible, inaccessible, infeasible, insuperable, insurmountable, unapproachable
Burton's Legal Thesaurus.
William C. Burton.
2006