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 

ol(de)

adverb. *in the identical way

The correlatives ᴹQ. olde, ol, or onal(de) appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/111), a combination of ᴹQ. on- “identical” and ᴹQ. -l(de) “ways”.

Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. imallë “in the identical way” using im- “same” and the later suffix -llë.

yalúmea

adjective. olden

yárea

adjective. olden

lai

adverb. very

onal(de)

adverb. *in the identical way