What is the greek and latin root for reciprocal?

The Latin root of "reciprocal" is "reciprocus", meaning "returning, alternate, mutual".

While there isn't a direct Greek root, the concept of reciprocity is deeply embedded in Greek thought, especially in the works of philosophers like Plato and Aristotle. They explored ideas like "antistrophe" (meaning "turning back, response"), which could be considered a conceptual precursor to the modern concept of reciprocal.

So, while there's no singular Greek root, the concept of reciprocity is deeply rooted in Greek philosophical traditions.