English
incidence
Incidence comes from Middle French incidence ‘incident’, from Medieval Latin incidentia ‘a falling upon’, and ultimately from Proto-Indo-European *ḱh₂d-.
- Proto-Indo-Europeanc. 4500–2500 BCE*ḱh₂d-root as named
- Proto-Indo-European, derivedc. 4500–2500 BCE*ḱád-e-tireconstructed
- Proto-Italicc. 1500–700 BCE*kadō‘to fall, sink’reconstructed
- Latinc. 75 BCE–200 CEcadōas cadere‘to fall’
- Latin, derivedc. 75 BCE–200 CEincidere‘to fall upon’
- Latin, derivedc. 75 BCE–200 CEincidenspresent participle of incidere
- Medieval Latinc. 600–1500incidentia‘a falling upon’
- Middle Frenchc. 1400–1600incidence‘incident’
- Englishtodaysame form
attested reconstructed ? uncertain or disputed
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*ḱh₂d-root as named
- Proto-Indo-European, derivedc. 4500–2500 BCE*ḱád-e-tireconstructed
- Proto-Italicc. 1500–700 BCE*kadō‘to fall, sink’reconstructed
- Latinc. 75 BCE–200 CEcadōas cadere‘to fall’
- Latin, derivedc. 75 BCE–200 CEincidere‘to fall upon’
- Latin, derivedc. 75 BCE–200 CEincidenspresent participle of incidere
- Medieval Latinc. 600–1500incidentia‘a falling upon’
- Middle Frenchc. 1400–1600incidence‘incident’
- Englishtodaysame form
Linked words
through Proto-Indo-European *ḱh₂d-
casual, cascade, decadence, coincident, 2 more
through Latin cadō ‘to fall’
case, chance, occasion, cheat, accident, decay, casualty, cadaver, decadent, coincide, deciduous, recidivism, cadence, occidental, occident, 16 more
Today it means
noun The act of something happening; occurrence.
Language periods are conventional ranges, not dates for this word.
Etymograph / Proto-Indo-European *ḱh₂d- / incidence