Qenya
olli(ni)
of the same number
li(n)-
prefix. many
linin-
prefix. many
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 correlatives ᴹQ. olli or ollini “of the same number” appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/108), a combination of ᴹQ. on- “same” and ᴹQ. -lli(ni) “number”.
Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. imalli(ni) “of the same number” using im- “same”.