• (America) IPA: /mɪsbɪˈlivɚ/
• (RP) IPA: /mɪsbɪˈliːvə/

misbeliever (plural misbelievers)

1. Someone who holds a bad or wrong belief; a heretic, an unbeliever.
   • 1603, Michel de Montaigne, John Florio, transl., The Essayes, […], printed at London: By Val[entine] Simmes for Edward Blount […], OCLC 946730821 ↗:

     , II.12:

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