INCREDULOUSLY
incredulously, unbelievingly, disbelievingly
(adverb) in an incredulous manner; “the woman looked up at her incredulously”
Source: WordNet® 3.1
Etymology
Adverb
incredulously (comparative more incredulously, superlative most incredulously)
In an incredulous manner; tending to disbelieve: skeptically.
Source: Wiktionary
In*cred"u*lous*ly, adv.
Definition: In an incredulous manner; with incredulity.
INCREDULOUS
In*cred"u*lous, a. Etym: [L. incredulus. See In- not, and Credulous.]
1. Not credulous; indisposed to admit or accept that which is related
as true, skeptical; unbelieving. Bacon.
A fantastical incredulous fool. Bp. Wilkins.
2. Indicating, or caused by, disbelief or incredulity. "An
incredulous smile." Longfellow.
3. Incredible; not easy to be believed. [R.] Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition