the GNU version of the Collaborative International Dictionary of English
adj. Not approachable; unapproachable; inaccessible; unequaled.
The Century Dictionary and Cyclopedia
Unapproachable.
Word Usage
"Jonathan Lethem told me that when he first read "The Gift," he pictured its author as a kind of inapproachable seer, either long dead or soaring so high in the intellectual stratosphere as to be unreachable."