The story
- Old English · inherited fromsǣwæter“seawater”
- Middle English · inherited fromseewater
- English todayseawater
From Middle English seewater, se water, from Old English sǣwæter (“seawater”), equivalent to sea + water. Cognate with Saterland Frisian Seewoater (“seawater”), West Frisian seewetter (“seawater”), Dutch zeewater (“seawater”), Icelandic sjóvatn (“seawater”).
Etymology from Wiktionary, CC BY-SA 4.0.