unscaleable

In any attack that won through the gatehouse, the guards would destroy the four flimsy wooden stairways and leave any intruder faced with unscaleable walls from which arrows and other lethal materials could be rained down.

This Scepter'd Isle Lackey, Mercedes 2004

The veil must be thicker than that invented by Turkish jealousy; the wall higher than the unscaleable tower of Vathek, which should conceal from her the workings of his heart, and hide from her view the secret of his actions.

The Last Man 2003

Its sides were sheer and unscaleable, falling to shaded purple depths.

Warlock Smith, Wilbur 2001

Khisanth skittered past piles of her superior's gems, which looked like unscaleable mountains to a mere mouse.

The Black Wing Kirchoff, Mary 1993

Dame Beatrice dismissed the unscaleable peak with a wave of her yellow claw.

My Bones Will Keep Mitchell, Gladys, 1901-1983 1977

They were already ascending the first slope, and the huge mass of the detached mountain towered above them in a series of unscaleable precipices.

The Texan A Story of the Cattle Country 1921

The tunnel had led straight, from where he had entered it beneath the side of the rock furthest from the unscaleable cliffs, toward the mighty barrier that had baffled him so long.

Thuvia, Maid of Mars Edgar Rice Burroughs 1912

At "there" he saw stars-and-stripes, dropped upon his back: Hogarth was away toward the door, while the bathers started with shouts, though in no bosom arose any impulse to follow, the bath-house being the centre of a maze of twenty unscaleable walls, prison within prison.

The Lord of the Sea 1906

All that he saw there, the quiet walled garden, the rows of elms on the terrace beside it, the dim green of the Heath, and the steep unscaleable grey blue barrier of the sky, had taken on an unfamiliar aspect, as it were a tragic simplicity and vastness.

The Divine Fire May Sinclair 1904

Such sorrow gives wings to the soul, it elevates and enlarges us; we are not jarred and crushed by violent attacks on a Fortress of Joy which to such attacks must ever be an unscaleable glacis.

Impressions and Comments Havelock Ellis 1899