The story
- Proto-Indo-European*úp
- Proto-Indo-European*upér
- Proto-Italic*super
- Latinsuper
- Latinsuper-
- Latinunda
- Latinundō
- Late Latinsuperundō
- Middle Frenchsouronder
- Middle Englishsourrounden
- English todaysurround
From Middle English sourrounden (“to submerge, overflow”), from Middle French souronder, suronder, from Late Latin superundō, from super + undō (“to rise in waves”), from unda (“wave”).
Etymology from Wiktionary, CC BY-SA 4.0.