The story
- Proto-Indo-European*ḱe?
- Proto-Indo-European*ḱóm
- Proto-Italic*kom
- Proto-Italic*kom-
- Latincon-
- Proto-Italic*katesnā
- Latincatēna
- Latincatēnō
- Latinconcatēnō
- Latinconcatēnātiō
- English todayconcatenation
Borrowed from Latin concatēnātiō. By surface analysis, concatenate + -ion. Related to chain.
Etymology from Wiktionary, CC BY-SA 4.0.