Where does “χορταίνω” come from?

χορταίνω (Byzantine Greek) comes from Ancient Greek χορτάζω, from Ancient Greek χόρτος, from Proto-Indo-European ǵʰórtos, from Proto-Indo-European ǵʰer- — to yearn for; to enclose; bowels, intestines.

Ancestry of “χορταίνω”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	χορτάζω	to feed, fatten; to feed, fill full of
2	Ancient Greek	χόρτος	feeding place for animals, barn, pasture;...
3	Proto-Indo-European	ǵʰórtos	enclosure
4	Proto-Indo-European	ǵʰer-	to yearn for; to enclose; bowels, intestines

Every word from Proto-Indo-European ǵʰer- →Every word from Proto-Indo-European ǵʰórtos →Every word from Ancient Greek χόρτος →