Gnomish
ail
noun. lake, pool
ailion
noun. lake, pool
cwancha-
verb. to ail
altha-
verb. to shoot up, grow (high)
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 word given as {cwanca- >>} G. cwancha- “to ail” in the Gnomish Lexicon of the 1910s, verb form of G. cwanc “sickly” (GL/28).
Neo-Sindarin: For purposes of Neo-Sindarin I would update this word to pavra- “to ail, be ill”, based on the later word [N.] paw “sickness” and its root ᴹ√KWAM (Ety/KWAM).