Qenya
inárea
as old as
inárea ní
as old as I am
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!
inárea
as old as
inárea ní
as old as I am
The correlative ᴹQ. inárea “as old as” appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/111), a combination of the relative pronoun ᴹQ. i and an adjectival form of ᴹQ. are “day”.
Neo-Quenya: For purposes of Neo-Quenya I would instead define a neologism ᴺQ. yanaurë “on the day when” using the relative pronoun ya and aurë; compare Q. yallumë “in times when”. I would then use its adjectival form ᴺQ. yanaurëa for “as old as”, more literally meaning “of the same days as”. For example: nás yanaurëa ní “he/she is as old as me, (lit.) he/she is of the same days as me”.