Where does “pièce justificative” come from?

pièce justificative (French) comes from French pièce, from Middle French piece, from Old French piece, from Vulgar Latin pettia, from Latin pettia, from Gaulish pettyā, from Proto-Celtic kʷezdis — piece, portion.

pièce justificative (French): proof of entitlement, a document proving...

Definitions

  1. proof of entitlement, a document proving...

Ancestry of “pièce justificative”, step by step

pièce justificative traces back through two separate lines of ancestry.

via French pièce

StepLanguageWordMeaning
1Frenchpièceroom; piece; coin
2Middle Frenchpiecepiece, bit, part; moment
3Old Frenchpiecepiece, bit, part; circa 1170, Chrétien de Troyes
4Vulgar Latinpettiapiece, portion
5Latinpettiapiece, portion
6Gaulishpettyā
7Proto-Celtickʷezdispiece, portion

via French justificative

StepLanguageWordMeaning
1Frenchjustificativefeminine singular of justificatif; justifying
Every word from Proto-Celtic kʷezdisEvery word from Gaulish pettyāEvery word from Latin pettia