sjóvatni
Sjóvatni is a term that can refer to several related concepts, primarily concerning bodies of water. In its most direct translation from Icelandic, it means "sea water." This typically denotes the saline water found in oceans and seas. However, the term can also be used more broadly to describe any large body of water, particularly in a natural context.
In some instances, sjóvatni might also be used colloquially to distinguish a large natural lake from smaller
The linguistic origin of sjóvatni highlights a potential nuance. "Sjó" means sea, and "vatni" is the genitive