Where does “quatrefoil” come from?

quatrefoil (Old French) comes from Old French quatre, from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto, from Latin quārtus, from Proto-Indo-European kʷeturtos, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

Ancestry of “quatrefoil”, step by step

quatrefoil traces back through two separate lines of ancestry.

via Old French quatre

StepLanguageWordMeaning
1Old Frenchquatrefour
2Latinquattŭorfour; 4
3Portuguesequartoordinal form of quatro; fourth; quarter; fourth;...
4Old Portuguesequartoquarter
5Latinquārtusfourth
6Proto-Indo-Europeankʷeturtos
7Proto-Indo-Europeankʷetwóresfour
8Proto-Indo-Europeankʷe-and

via Old French foil

StepLanguageWordMeaning
1Old Frenchfoilleaf
2Latinfoliuma leaf; a petal; a sheet or leaf of paper
3Proto-Italic*foljom
4Proto-Indo-Europeanbʰolh₃yomleaf
5Proto-Indo-Europeanbʰleh₃-bloom, flower
6Proto-Indo-Europeanbʰel-to sound; to speak, roar, bark; shiny, white; to...
7Proto-Indo-Europeanbʰōl-

Words derived from “quatrefoil

Every word from Proto-Indo-European kʷe-Every word from Proto-Indo-European kʷetwóresEvery word from Proto-Indo-European kʷeturtos