Where does “plains” come from?

Plains derives from Old French plain, from Latin planum meaning flat or level, ultimately from Proto-Indo-European pleh₁-.

plains (English): plural of plain; Third-person singular simple...

Definitions

  1. plural of plain; Third-person singular simple...

Ancestry of “plains”, step by step

StepLanguageWordMeaning
1EnglishplainFlat, level; Simple; Obvious
2Middle Englishpleynclear; unambiguous
3Anglo-NormanpleynAlternative form of plein
4Old Frenchplayn
5Old Frenchplainfull; plain; flat
6Latinplēnusfull; filled; complete
7Proto-Italicplēnosfull
8Proto-Indo-Europeanpl̥h₁nósfull
9Proto-Indo-Europeanpleh₁-to fill
Every word from Proto-Indo-European pleh₁-