Where does “incredulity” come from?

Incredulity comes from Old French incredulité, from Late Latin incredulitas, combining Latin in- (not) and -itas (noun suffix) with a root from Proto-Indo-European dʰeh₁- (to place or put).

incredulity (English): Unwillingness or inability to believe; doubt...

Definitions

  1. Unwillingness or inability to believe; doubt...

Ancestry of “incredulity”, step by step

StepLanguageWordMeaning
1Old Frenchincredulitéincredulity
2Late Latinincredulitasdisbelief, incredulity; unbelief
3Latinincredulusunbelieving, disbelieving, incredulous;...
4Latincrēdulusthat easily believes a thing, easy of belief
5Latin-ulusUsed to form a diminutive of a noun, indicating...
6Proto-Italic-olos
7Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
8Proto-Indo-European-e-lós
9Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -lósEvery word from Latin -ulusEvery word from Latin crēdulus