The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Proto-Indo-European*welH-
- Proto-Italic*wolwō
- Latinvolvō
- Latinconvolvō
- Latinconvolūtus
- Englishconvolution
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- English todayconvolutional
From convolution + -al.
Etymology from Wiktionary, CC BY-SA 4.0.