The story
- Proto-Indo-European*de
- Proto-Indo-European*déh₁
- Proto-Italic*dē
- Latindē
- Latindē-
- Englishde-
- Latinduplex
- Latinduplicātus
- Englishduplicate
- Englishdeduplicate
- English todaydeduplicator
From deduplicate + -or.
Etymology from Wiktionary, CC BY-SA 4.0.