Where does “Ага́пиꙗ” come from?

Ага́пиꙗ (Old East Slavic) comes from Old Church Slavonic Ага́пиꙗ, from Ancient Greek Ἀγάπια, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...