Where does “pokřtít” come from?

pokřtít (Czech) comes from Czech křtít, from Old Czech [[krstíti]], [[křstíti]], [[křtíti]], from Proto-Slavic krьstiti, from Proto-Slavic krьstъ, from Old High German Krist, from Latin Chrīstus, from Ancient Greek Χριστός, from Ancient Greek χρίω — to rub; to stroke; to grind.

Ancestry of “pokřtít”, step by step

StepLanguageWordMeaning
1Czechkřtítto baptize to sprinkle or pour water over
2Old Czech[[krstíti]], [[křstíti]], [[křtíti]]
3Proto-Slavickrьstitito baptize
4Proto-Slavickrьstъ"West Slavic:" baptism; "East and South Slavic:"...
5Old High GermanKrist
6LatinChrīstus
7Ancient GreekΧριστόςanointed; messiah; annointed, the annointed one,...
8Ancient Greekχρίωto rub or smear (especially the body) with oil or unguents; to anoint
9Proto-Indo-Europeangʰrēy-to smear; to paint, streak, smear
10Proto-Indo-Europeangʰer-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