STUNNINGLY
spectacularly, stunningly
(adverb) in a spectacular manner; “the area was spectacularly scenic”
Source: WordNet® 3.1
Etymology
Adverb
stunningly (comparative more stunningly, superlative most stunningly)
So as to stun or amaze.
a stunningly expensive gift
Source: Wiktionary
STUNNING
Stun"ning, a.
1. Overpowering consciousness; overpowering the senses; especially,
overpowering the sense of hearing; confounding with noise.
2. Striking or overpowering with astonishment, especially on account
of excellence; as, stunning poetry. [Slang] C. Kingsley.
– Stun"ning*ly, adv. [Slang]
STUN
Stun, v. t. [imp. & p. p. Stunned; p. pr. & vb. n. Stunning.] Etym:
[OE. stonien, stownien; either fr. AS. stunian to resound (cf. D.
stenen to groan, G. stöhnen, Icel. stynja, Gr. stan to thunder, and
E. thunder), or from the same source as E. astonish. *168.]
1. To make senseless or dizzy by violence; to render senseless by a
blow, as on the head.
One hung a poleax at his saddlebow, And one a heavy mace to stun the
foe. Dryden.
2. To dull or deaden the sensibility of; to overcome; especially, to
overpower one's sense of hearing.
And stunned him with the music of the spheres. Pope.
3. To astonish; to overpower; to bewilder.
William was quite stunned at my discourse. De Foe.
Stun, n.
Definition: The condition of being stunned.
Source: Webster’s Unabridged Dictionary 1913 Edition