shaman n.

1690s, "priest of the Ural-Altaic peoples of northern Asia," probably via German Schamane, from Russian sha'man, from Tungus saman, which, according to OED is perhaps from Chinese sha men "Buddhist monk," from Prakrit samaya-, from Sanskrit sramana-s "Buddhist ascetic." Extended to "similar personages in other parts" (OED), especially native Americans. Related: Shamanic.