Where does “pentatonicism” come from?

pentatonicism (English) comes from English pentatonic, from English tonic, from English tone, from Middle English tone, from Latin tonus, from Ancient Greek τόνος, from Proto-Hellenic tónos, from Proto-Indo-European tónos — to stretch, to extend.

pentatonicism (English): The condition of being pentatonic

Definitions

  1. The condition of being pentatonic

Ancestry of “pentatonicism”, step by step

pentatonicism traces back through two separate lines of ancestry.

via English pentatonic

StepLanguageWordMeaning
1EnglishpentatonicBased on five tones; The pentatonic scale
2EnglishtonicPertaining to tension, especially of muscles;...
3EnglishtoneA specific pitch; An interval of a major second;...
4Middle Englishtonethe one
5LatintonusThe stretching or straining of a rope; A strain;...
6Ancient Greekτόνοςrope, cord; chord; tone, note
7Proto-Hellenictónosrope, cord; tension
8Proto-Indo-Europeantónossomething stretched; chord, fiber, string
9Proto-Indo-Europeanten-to stretch, to extend

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European ten-