Where does “stretchableness” come from?

stretchableness (English) comes from English ism, from English -ism, from Latin -ismus, from Ancient Greek -ισμός, from Ancient Greek -μός, from Proto-Indo-European -mós — Creates action/result nouns from verb stems.

Ancestry of “stretchableness”, step by step

stretchableness traces back through two separate lines of ancestry.

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

via English stretchable

StepLanguageWordMeaning
1EnglishstretchableCapable of being stretched
2EnglishstretchTo lengthen by pulling; To lengthen when pulled;...
3Middle EnglishstrecchenTo stretch out, spread, extend; To stretch,...
4Old Englishstreċċanto stretch, hold out, extend, spread out,...
5Proto-West Germanicstrakkjanto stretch, to make straight
6Proto-Indo-European(s)treg-rigid, stiff; to be stiff, rigid, strong
Every word from Proto-Indo-European -mósEvery word from English -ismEvery word from English ism