Where does “semidiapason” come from?

semidiapason (English) comes from English diapason, from Latin diapason, from Ancient Greek διαπασῶν, from Ancient Greek διά, from Proto-Indo-European dwís, from Proto-Indo-European dwóh₁ — two.

semidiapason (English): A diminished octave

Definitions

  1. A diminished octave

Ancestry of “semidiapason”, step by step

semidiapason traces back through two separate lines of ancestry.

via English diapason

StepLanguageWordMeaning
1EnglishdiapasonThe musical octave; The range or scope of...
2Latindiapason—
3Ancient Greekδιαπασῶνoctave
4Ancient Greekδιάthroughout
5Proto-Indo-Europeandwístwice, doubly; in two
6Proto-Indo-Europeandwóh₁two

via English semi

StepLanguageWordMeaning
1EnglishsemiA semi-detached house; A semitrailer; a...
2Englishsemi-half; partial, incomplete; somewhat, rather,...
3Latinsēmi-half
4Proto-Indo-Europeansēmihalf; partially
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwís →Every word from Ancient Greek διά →