The story
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Indo-European*ḱewh₁-
- Proto-Indo-European*ḱuh₁mósder.?
- Latincumulus
- Latincumulō
- Latinaccumulō
- Latinaccumulātus
- Middle Englishaccumylaten
- Englishaccumulate
- Englishaccumulative
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todayaccumulatively
From accumulative + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.