A noun in the Qenya Lexicon of the 1910s for a “spring of water”, derived from the root ᴱ√KAPA “leap, spring” (QL/45).
Early Quenya
kapalinda
place name. Kapalinda
kapalinda
noun. spring of water
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
Source of the river Kelusindi in the earliest Lost Tales (LT1/157), it seems to simply be kapalinda “spring of water” used as a name, as suggested by Christopher Tolkien (LT1A/Kapalinda).