adv. (UN-1 11; cf. prec.)
1666. Boyle, Orig. Forms & Qual., II. ix. 395. It appeard a heap of Corpuscles unimaginably small.
1672. Sterry, 2nd Posth. Vol., 331. The Righteousness of God in Christ unimaginably outshineth ten thousand Suns.
1734. Watts, Reliq. Juv., 191. And thus we unimaginably slide into a cordial Defence of the Cause.
1857. Hawthorne, Eng. Note-bks. (1870), II. 432. Hues indescribably beautiful, and unimaginably, unless one can conceive of the colours of the rainbow [etc.].
1883. Harpers Mag., June, 115/2. Unimaginably frightful shapes.