Where does “anti-” come from?

anti- (Ido) comes from Italian anti-, from Latin ante, from Ancient Greek κλίσις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

anti- (Ido): anti-, contra-, counter-

Definitions

anti-, contra-, counter-

Ancestry of “anti-”, step by step

Step	Language	Word	Meaning
1	Italian	anti-	anti-; ante-
2	Latin	ante	before, in front, forwards; before; before,...
3	Ancient Greek	κλίσις	bending, inclination; a lying down; a place for...
4	Ancient Greek	-σῐς	"suffix forming nouns"
5	Ancient Greek	-τις	retained after dentals
6	Proto-Indo-European	-tis	Derives abstract/action nouns from verb roots

Every word from Proto-Indo-European -tis →Every word from Ancient Greek -σῐς →Every word from Ancient Greek κλίσις →