Where does “kiasma” come from?

kiasma (Finnish) comes from Ancient Greek χίασμα, from Ancient Greek χιάζειν, from Ancient Greek Χ, from Ancient Greek Χριστός, from Ancient Greek χρίω, from Proto-Indo-European gʰrēy-, from Proto-Indo-European gʰer- — to rub; to stroke; to grind.

kiasma (Finnish): chiasma, chiasm crossing of two nerves, ligaments, chromatids etc

Definitions

chiasma, chiasm crossing of two nerves, ligaments, chromatids etc

Ancestry of “kiasma”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	χίασμα	crosspiece
2	Ancient Greek	χιάζειν	to mark with a chi; to mark with the letter chi
3	Ancient Greek	Χ	Chi; chi
4	Ancient Greek	Χριστός	anointed; messiah; annointed, the annointed one,...
5	Ancient Greek	χρίω	to rub or smear (especially the body) with oil or unguents; to anoint
6	Proto-Indo-European	gʰrēy-	to smear; to paint, streak, smear
7	Proto-Indo-European	gʰer-	to rub; to stroke; to grind

Every word from Proto-Indo-European gʰer- →Every word from Proto-Indo-European gʰrēy- →Every word from Ancient Greek χρίω →