Where does “ἀντίδοτον” come from?

ἀντίδοτον (Ancient Greek) comes from Ancient Greek ἀντίδοτος, from Ancient Greek ἀντιδίδωμι, from Ancient Greek ᾰ̓ντῐ- — before, against; like; against.

Ancestry of “ἀντίδοτον”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἀντίδοτος	given as a remedy for
2	Ancient Greek	ἀντιδίδωμι	I give in return, repay
3	Ancient Greek	ᾰ̓ντῐ-	before, against; like; against

Every word from Ancient Greek ᾰ̓ντῐ- →Every word from Ancient Greek ἀντιδίδωμι →Every word from Ancient Greek ἀντίδοτος →