INCREDIBLY

fabulously, fantastically, incredibly

(adverb) exceedingly; extremely; “she plays fabulously well”; “behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains”

incredibly, improbably, implausibly, unbelievably

(adverb) not easy to believe; “incredibly, she survived the crash”

Source: WordNet® 3.1

Etymology

Adverb

incredibly (comparative more incredibly, superlative most incredibly)

(manner) In an incredible manner; not to be believed.

(degree) To a great extent; extremely.

Used to note the surprising or hard-to-believe nature of what is being said and suggest that it is nevertheless true.

Anagrams

• bicylinder

Source: Wiktionary

In*cred"i*bly, adv.

Definition: In an incredible manner.

INCREDIBLE

In*cred"i*ble, a. Etym: [L. incredibilis: cf. OF. incredible. See In- not, and Credible.]

Definition: Not credible; surpassing belief; too extraordinary and improbable to admit of belief; unlikely; marvelous; fabulous. Why should it be thought a thing incredible with you, that God should raise the dead Acts xxvi. 8.

Source: Webster’s Unabridged Dictionary 1913 Edition