mystagogue

noun

mys·​ta·​gogue ˈmi-stə-ˌgäg 

1

: one who initiates another into a mystery cult

2

: one who understands or teaches mystical doctrines

mystagogy

ˈmi-stə-ˌgä-jē 

-ˌgō-

noun

Word History

Etymology

Latin mystagogus, from Greek mystagōgos, from mystēs initiate (perhaps akin to Greek myein to be closed) + agein to lead — more at agent

First Known Use

circa 1540, in the meaning defined at sense 1