the.com/initiate

means To begin something or formally induct someone into a group or process.

from From Latin initiare, 'to begin, to initiate (especially into religious mysteries),' itself from initium, 'a beginning, an entrance,' built from inire, 'to go into' — in ('into') plus ire ('to go'). The same root gives us 'initial.' The religious-mysteries sense stuck around in English, which is why 'initiate' still carries a whiff of secret rites and induction ceremonies alongside its plainer meaning of just starting something.