Where does “Christus” come from?

Christus (Latin) comes from Ancient Greek Χριστός, from Ancient Greek χρίω, from Proto-Indo-European gʰrēy-, from Proto-Indo-European gʰer- — to rub; to stroke; to grind.

Ancestry of “Christus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Χριστός	anointed; messiah; annointed, the annointed one,...
2	Ancient Greek	χρίω	to smear with , rub on something; to anoint with...
3	Proto-Indo-European	gʰrēy-	to smear; to paint, streak, smear
4	Proto-Indo-European	gʰer-	to rub; to stroke; to grind

Every word from Proto-Indo-European gʰer- →