Where does “fínégra” come from?

fínégra (Middle Irish) comes from Old French vinaigre, from Old French aigre, from Vulgar Latin acrus, from Latin ācer, from Latin saccharum, from Ancient Greek σάκχαρ, from Sanskrit शर्करा, from Proto-Indo-Aryan śárkaraH — gravel, boulder; boulder; gravel.

Ancestry of “fínégra”, step by step

StepLanguageWordMeaning
1Old Frenchvinaigrevinegar
2Old Frenchaigresour; acrid
3Vulgar Latinacrussour
4Latinācersharp, sour, bitter, pungent
5Latinsaccharumsugar
6Ancient Greekσάκχαρsugar; sugar cane
7Sanskritशर्कराgravel, grit, pebbles, shingle, gravelly mould or...
8Proto-Indo-AryanśárkaraH
9Proto-Indo-IranianćárkaraH
10Proto-Indo-Europeanḱorkeh₂gravel, boulder; boulder; gravel

Words derived from “fínégra

Every word from Proto-Indo-European ḱorkeh₂Every word from Proto-Indo-Iranian ćárkaraHEvery word from Proto-Indo-Aryan śárkaraH