Where does “de rigueur” come from?

de rigueur (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.

de rigueur (French): absolutely necessary

Definitions

  1. absolutely necessary

Ancestry of “de rigueur”, step by step

de rigueur 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 rigueur

StepLanguageWordMeaning
1Frenchrigueurrigour
2Italianrigorestrictness, severity, harshness; rigour; penalty,...
3Latinrigorstiffness, rigidity; rigor, cold, harshness,...
4Latin-orused to form a third-declension masculine...
5Proto-Italic-ōsCreates masculine action nouns or result nouns...
6Proto-Indo-European-ōsCreates masculine and feminine action nouns or...
7Proto-Indo-European-oss
8Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

Words derived from “de rigueur

Every word from Proto-Indo-European pósEvery word from Proto-Indo-European póstiEvery word from Proto-Italic posti