The Oxford Thesaurus An A-Z Dictionary of Synonyms - unapproachableadj.

1) distant, remote, aloof, reserved, standoffish, austere, withdrawn, unfriendly, forbidding, chilly, cool, cold, frigid: James seems unapproachable, but in fact he's a very warm person. 2 inaccessible, remote, unreachable, out-of-the-way, out of reach, beyond reach: Her house is unapproachable except from the sea.