Antonyms of approachable :
Examples of usage:
A long and steep flight of steps leads up to it from the river, but on the other side it is approachable by a broad though winding road, with the backs chiefly of some large houses and dead walls on each side, making it altogether a most secluded situation. "The Prime Minister", W.H.G. Kingston.
Its holiest place was indeed approachable, once annually, by one representative person; enough to illustrate and to seal a hope; but otherwise, and far more deeply, the conditions symbolized separation and a Divine reserve. "Messages from the Epistle to the Hebrews", Handley C.G. Moule.
As far as I have ever been able to discover, the hermit, for all his name and consequent reputation, is less timorous and more approachable than any other New England representative of his " sub- genus." "Birds in the Bush", Bradford Torrey.