incredulity

noun

Etymology: Attested since 1430. From Middle English incredulite, from Old French incredulité, from Late Latin incredulitas, from Latin incredulus (“unbelieving”) + -itas (“-ity”), equivalent to incredulous + -ity.

1. Unwillingness or inability to believe; doubt about the truth or verisimilitude of something; disbelief.

   “Wide went her eyes in wonder and incredulity, as she beheld this seeming apparition risen from the dead.”

   “It was a casual sneer, obviously one of a long line. There was hatred behind it, but of a quiet, chronic type, nothing new or unduly virulent, and he was taken aback by the flicker of amazed incredulity that passed over the younger man's ravaged face.”

2. Religious disbelief; lack of faith.