one’s eye or eyes
Obligatorily possessed nouns do not have separate singular and plural (or collective) forms. So a word like sarōña can mean either one or both eyes (or more if we’re talking about aliens with more than two eyes.) One can specify, by saying things like sarōña tēna for both eyes, sarōña ān for one eye, sarōña jahūta for right eye, and so on, but it is not obligatory.
In some dialects, plural forms do exist, so sarōña would mean one or both eyes, and sarōñi would mean both eyes specifically. Standard Kēlen does not use these plural forms.