Where does “diaphragmless” come from?

diaphragmless (English) comes from English diaphragm, from Ancient Greek διάφραγμα, from Ancient Greek διά, from Proto-Indo-European dwís, from Proto-Indo-European dwóh₁ — two.

diaphragmless (English): Lacking a diaphragm

Definitions

  1. Lacking a diaphragm

Ancestry of “diaphragmless”, step by step

diaphragmless traces back through two separate lines of ancestry.

via English diaphragm

StepLanguageWordMeaning
1EnglishdiaphragmIn mammals, a sheet of muscle separating the...
2Ancient Greekδιάφραγμαpartition or barrier; lock in a canal; diaphragm,...
3Ancient Greekδιάthroughout
4Proto-Indo-Europeandwístwice, doubly; in two
5Proto-Indo-Europeandwóh₁two

via English less

StepLanguageWordMeaning
1EnglishlessTo a smaller extent or degree; comparative form...
2Middle Englishlesfalse; lying; deceptive; falsehood; a lie
3Old Englishlēasfalse, lax; false, void, loose; devoid of, loose...
4Proto-Germanic*laus—
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwís →Every word from Ancient Greek διά →