unbelieving
adjective
[ ˌʌnbɪˈliːvɪŋ ]
• not believing someone or something; incredulous.
• "Drew could only stand there, wide-eyed and unbelieving"
Similar:
faithless,
non-believing,
agnostic,
atheistic,
non-theistic,
heathen,
pagan,
infidel,
irreligious,
unenlightened,
disbelieving,
doubting,
doubtful,
sceptical,
cynical,
unconvinced,
incredulous,
Opposite:
believing,