The story
- Proto-Indo-European*kel-
- Latinceler
- Latinceleritās
- Old Frenchceleritee
- English todaycelerity
From Old French celeritee (compare French célérité), from Latin celeritas, from celer (“fast, swift”).
Words from the same roots
Latinceleritas all →
celeritoussupercee
Etymology from Wiktionary, CC BY-SA 4.0.