Where does “diapazon” come from?

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

diapazon (Romanian): tuning fork

Definitions

tuning fork

Ancestry of “diapazon”, step by step

Step	Language	Word	Meaning
1	French	diapason	range, diapason; a tuning fork
2	Latin	diapason	—
3	Ancient Greek	διαπασῶν	octave
4	Ancient Greek	διά	throughout
5	Proto-Indo-European	dwís	twice, doubly; in two
6	Proto-Indo-European	dwóh₁	two

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwís →Every word from Ancient Greek διά →