Where does “antisida” come from?

antisida (French) comes from French anti-, from Ancient Greek ἀντι-, from Ancient Greek ᾰ̓ντῐ́ — opposite.

antisida (French): anti-AIDS

Definitions

Step	Language	Word	Meaning
1	French	anti-	anti-
2	Ancient Greek	ἀντι-	anti-, against; like, reminiscent of
3	Ancient Greek	ᾰ̓ντῐ́	opposite