seawater

• sea water

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”).

seawater (usually uncountable, plural seawaters)

1. The saltwater of a sea or ocean.

• water

seawater (not comparable)

1. (not comparable) Consisting of seawater.

   The continual seawater splashes corroded our equipment

2. (not comparable) Associated in some way with seawater, or intended for dealing with seawater.

   The sharks in the aquarium had to be kept in a seawater tank

   Aboard the ship we needed seawater soap for washing our clothes

   Though it was a nuisance to arrange them, we found the seawater showers very refreshing

• teawares