The story
- Proto-Indo-European*kap-
- Proto-Indo-European*kapyéti
- Proto-Italic*kapjō
- Latincapiō
- Latincapāx
- Latincapācitās
- Old Frenchcapacite
- Middle Englishcapacite
- Englishcapacity
- Englishcapacitate
- English todaycapacitation
From capacitate + -ion.
Etymology from Wiktionary, CC BY-SA 4.0.