Where does “cristianissimo” come from?

cristianissimo (Italian) comes from Italian cristiano, from Latin Christiānus, from Latin Chrīstus, 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 “cristianissimo”, step by step

StepLanguageWordMeaning
1ItaliancristianoChristian; a Christian; a person
2LatinChristiānusChristian
3LatinChrīstus
4Ancient GreekΧριστόςanointed; messiah; annointed, the annointed one,...
5Ancient Greekχρίωto rub or smear (especially the body) with oil or unguents; to anoint
6Proto-Indo-Europeangʰrēy-to smear; to paint, streak, smear
7Proto-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