unfaith

plural unfaiths

1. uncountableusuallyAbsence of faith.

   Remember old years and do not break your oath with me, Jehane, since God abhors nothing so much as unfaith.

   1921, James Branch Cabell, Chivalry

   2 more examples

   The true religion occupies the happy mean between miserable unfaith, on the one hand, and timorous superstition, wild fanaticism, and pietistical zeal on the other.

   1893, Richard Falckenberg, History Of Modern Philosophy

   But schooling and native shrewdness had raised up in the younger men an unfaith in old usages, so judgment halted between sentence and execution.

   1903, Mary Hunter Austin, The Land Of Little Rain