Adjective : an unapproachable spot; an unapproachable person. ,unapproachable mastery of her art.    From Dictionary.com. 

But the imperial scion, (who, when he pleased, could assume the unapproachability of the blood royal,) made it apparent that he was no longer in a mood to be questioned.    From Wordnik.com.  [Blackwood's Edinburgh Magazine — Volume 56, No. 345, July, 1844] Reference

Bogdanovich plainly adored Grant, and here he captures Grant's easy charm along with his essential unapproachability, his "sparkle of joy mixed with mischievousness," and his cadences (Grant on the Oscars: "You know, there is something a little embarrassing about all these wealthy people publicly congratulating each other … 'we know you're making a million dollars — now come on up and get your little medal for it!'").    From Wordnik.com.  [Wolves, Actors, Jihadis] Reference

Somehow, Jim had been acquiring dignity and unapproachability.    From Wordnik.com.  [The Brown Mouse] Reference

Men like confidence, though not unapproachability; graciousness, not pushovers.    From Wordnik.com.  [Top stories from Times Online] Reference

For cool, pleasant and skillful unapproachability, a co-ed girl breaks all records.    From Wordnik.com.  [At Good Old Siwash] Reference

Hence, the principle of untouchability and unapproachability was maintained very strictly.    From Wordnik.com.  [Desicritics] Reference

For me too it underlined the very raw unapproachability of much of that traumatic past ….    From Wordnik.com.  [Slugger O'Toole] Reference

The lumber-jack demands in his boss a certain fundamental unapproachability, whatever surface bon-homie he may evince.    From Wordnik.com.  [The Blazed Trail] Reference

Yet again Thomson is finding virtue in his unapproachability and aloofness, The fact that he kept his worries to himself and did not consult others in the side can not be considered a positive trait.    From Wordnik.com.  [Cricket Web - Latest News] Reference

Whoever had wealth displayed it in order to be admired; whoever had a social position displayed his unapproachability and the weight of his dignity, as, for instance, when with an absent look and lost in the burden of his own existence he entered a dining-hall.    From Wordnik.com.  [The New Society] Reference

Finally, when they re-embarked farther down stream, they warmly bade farewell to the old boy, told him emphatically of the unapproachability of his Province, and bowed and waved handkerchiefs until beyond a bend in the river they lost sight of his memorable shape.    From Wordnik.com.  [The Tale of a Trooper] Reference

“But how often I have felt proud of her, proud of her majestic beauty and social tact,” thought he; “been proud of my house, in which she received all Petersburg, proud of her unapproachability and beauty.    From Wordnik.com.  [War and Peace] Reference

A week earlier; he had always been too conscious until that moment of a certain unapproachability, a transcendent daintiness, audacious and the reverse from fragile, which nevertheless had kept him at arms 'length.    From Wordnik.com.  [Winner Take All] Reference

"But how often I have felt proud of her, proud of her majestic beauty and social tact," thought he; "been proud of my house, in which she received all Petersburg, proud of her unapproachability and beauty.    From Wordnik.com.  [War and Peace] Reference