Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

keluste

noun. outflow

A noun for “outflow” appearing in the Quenya Verbal System (QVS) from 1948 as a combination of the verb kelu- “flow” and the “general action suffix” -ste (PE22/110).

Neo-Quenya: In Common Eldarin: Verb Structure (EVS2) of the early 1950s, this suffix became -sta (PE22/137 and note #40), so I would adapt this noun as ᴺQ. celusta “outflow” for purposes of Neo-Quenya.