qua

Actually, it looks like Aristotle didn't use anything; I just looked at a manuscript translated "man qua man" and it was just "anthropos anthropou"...

Only used in Aristotle in Latin translations of Aristotle, however. The corresponding Greek word, if it was used, would begin with /p/.

Not quite a Greek Remark, as is my list title, but its use in Arisotle warrants its inclusion.

"in the capacity of"