a. (UN-1 7 b, 5 b.)
1611. Cotgr., Irreveland, vnreuealable, not to be reuealed.
1826[?]. Coleridge, Ne Plus Ultra, 11. The Dragon foul and fellThe unrevealable, And hidden one.
1846. G. Moore, Power of Soul (ed. 2), 9. These proposers of an unrevealable divinity.