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