unscalable

Adjective

 * 1) Not scalable, that cannot be climbed.
 * 2) * 1903,, , I. Of Our Spiritual Strivings,
 * Why did God make me an outcast and a stranger in mine own house? The shades of the prison-house closed round about us all: walls strait and stubborn to the whitest, but relentlessly narrow, tall, and unscalable to sons of night who must plod darkly on in resignation, or beat unavailing palms against the stone, or steadily, half hopelessly, watch the streak of blue above.
 * 1) Not scalable, that cannot be changed in scale.
 * Why did God make me an outcast and a stranger in mine own house? The shades of the prison-house closed round about us all: walls strait and stubborn to the whitest, but relentlessly narrow, tall, and unscalable to sons of night who must plod darkly on in resignation, or beat unavailing palms against the stone, or steadily, half hopelessly, watch the streak of blue above.
 * 1) Not scalable, that cannot be changed in scale.