Qenya
aian(an)
adverb. at another time, at some other time
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!
The correlative ᴹQ. {waryan(an) >>} aian(an) “at another time, at some other time” appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/109 note #112), a combination of ᴹQ. aia- “other” and ᴹQ. -n(an) “time”. There was also waryallume in a draft section, deleted and not replaced (PE23/110 note #121).
Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. hyalumë “another time” using later hya for “other” and lúmë for “time”.