initiated

Definitions:

Instructed in the first principles; entered.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (participle, adjective) (p. p. & a.) (past participle, adjective)

Usage examples:

" You will think differently, when you are farther initiated replied Lorinser.
- The Children of the World by Paul Heyse
" But we- the Initiated cried Pentaur, " turn our attention to them also.
- The Complete Historical Romances of Georg Ebers by Georg Ebers
I was soon initiated into the routine of lazaretto ceremonies and restrictions.
- Incidents of Travel in Greece, Turkey, Russia, and Poland, Vol. I (of 2) by John Lloyd Stephens