Where does “plainsong” come from?

plainsong (English) comes from English plain, from Middle English pleyn, from Anglo-Norman pleyn, from Old French playn, from Old French plain, from Latin plēnus, from Proto-Italic plēnos, from Proto-Indo-European pl̥h₁nós — to fill.

plainsong (English): A form of monophonic chant in unison using the...

Definitions

  1. A form of monophonic chant in unison using the...

Ancestry of “plainsong”, step by step

plainsong traces back through 3 separate lines of ancestry.

via English plain

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

via English song

StepLanguageWordMeaning
1EnglishsongA musical composition with lyrics for voice or...
2Thaiสอง2
3Proto-Taisoːŋᴬtwo
4Middle Chinese

via Latin cantus planus

StepLanguageWordMeaning
1Latincantus planus
Every word from Proto-Indo-European pleh₁-Every word from Proto-Indo-European pl̥h₁nósEvery word from Proto-Italic plēnos