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 

immallume

adverb. *any time

The correlative ᴹQ. immallume appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/110), a combination of ᴹQ. imma “any” and ᴹQ. -llume “time”.

Neo-Quenya: Since ᴹQ. imma “any” too closely resembles the later prefix Q. im- “same”, for purposes of Neo-Quenya I would update this to ᴺQ. ailumë “any time” using the hypothetical prefix ᴺQ. ai(a)- “any”; see that entry for discussion.