Dictionary
un•as•sail•a•ble
Pronunciation: (un"u-sā'lu-bul), [key]—
adj.
1. not open to attack or assault, as by military force or argument:
unassailable fortifications; unassailable logic.
2. not subject to denial or dispute:
Shakespeare's genius gives his works an unassailable position in world literature. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.