Qenya
etsir
noun. mouth of a river, mouth of a river, *(lit.) outflow
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!
A noun in The Etymologies of the 1930s glossed “mouth of a river”, a combination of ᴹQ. et “out” and ᴹQ. sir- “flow” (Ety/ET). Its Noldorin cognate N. ethir reappeared as S. ethir “outflow” in later writings (RC/350).