misbeliever

From Middle English misbilevere, equivalent to misbelieve +‎ -er.

• (General American) IPA^(key): /mɪsbɪˈlivɚ/
• (Received Pronunciation) IPA^(key): /mɪsbɪˈliːvə/

misbeliever (plural misbelievers)

1. Someone who holds a bad or wrong belief; a heretic, an unbeliever.
   • 1603, Michel de Montaigne, translated by John Florio, The Essayes […], London: […] Val[entine] Simmes for Edward Blount […], →OCLC:
     , II.12:

     We are placed in the country […] where we feare the menaces wherewith she threatneth all mis-beleevers, or follow her promises.