The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Proto-Indo-European*upó
- Proto-Italic*supo
- Latinsub
- Latinsub-
- Proto-Indo-European*h₁em-
- Proto-Indo-European*h₁émeti
- Proto-Italic*emō
- Latinemō
- Latinsūmō
- Latincōnsūmō
- Latincōnsūmptus
- Middle Englishconsumptive
- Englishconsumptive
- English todayconsumptiveness
From consumptive + -ness.
Etymology from Wiktionary, CC BY-SA 4.0.