The story
- Proto-Indo-European*ḱewh₁-
- Proto-Indo-European*ḱuh₁mósder.?
- Latincumulus
- Latincumulō
- Latincumulātus
- English todaycumulate
First attested in 1534; borrowed from Latin cumulātus, perfect passive participle of cumulō (“to pile up”), see -ate (etymology 1, 2 and 3). Sporadic use of the participle up until Early Modern English.
Etymology from Wiktionary, CC BY-SA 4.0.