Where does “d'où” come from?

d'où (French) comes from French dé, from Middle French de, from Old French dé, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti, from Proto-Indo-European pósti — afterwards, post; by, at.

d'où (French): from where; whence; from which place or source;...

Definitions

  1. from where; whence; from which place or source;...

Ancestry of “d'où”, step by step

d'où traces back through two separate lines of ancestry.

via French

StepLanguageWordMeaning
1Frenchdie; diced slice; thimble
2Middle Frenchdeof; from
3Old Frenchdie
4Latinof; concerning; about
5Latinpostbehind; after, since, besides, except; behind,...
6Latinposteablative singular of postis
7Proto-Italicpostibehind, after
8Proto-Indo-Europeanpóstiafter
9Proto-Indo-Europeanpósafterwards, post; by, at

via French

StepLanguageWordMeaning
1Frenchwhere; At that time; when; whither
2Middle Frenchwhere
3Latinautor
4Proto-Italic*autieither, or
5Proto-Indo-Europeanh₂ewtion the other hand
6Proto-Indo-Europeanh₂ewaway from, off; again
7Proto-Indo-EuropeanǵʰePostpositional intensifying particle: indeed, at any rate, in fact
Every word from Proto-Indo-European pósEvery word from Proto-Indo-European póstiEvery word from Proto-Italic posti