Where does “hydraulicus” come from?

hydraulicus (Latin) comes from Ancient Greek ὑδραυλικός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “hydraulicus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὑδραυλικός	of a water organ
2	Ancient Greek	-ικός	of or pertaining to, in the manner of; -ic
3	Ancient Greek	-κός	forms adjectives with the sense of 'of or...
4	Proto-Indo-European	-ḱos	-y, -ic