Also see definition of "Privily" in Word Study
Study Dictionary
Privily
PRIVY; PRIVILY [ISBE]
PRIVY; PRIVILY - priv'-i, priv'-i-li: These words are obsolete in modern English and are replaced by "secret," "secretly," rather than by the cognates "private," "privately." the Revised Version (British and American) usually has not altered the King James Version's use of the word, but in Ps 11:2 has substituted "in darkness" and in Jdg 9:31 uses "craftily," margin "in Tormah" (see TORMAH). In Ezek 21:14, the King James Version "entereth into their privy chambers," "privy" is a gloss, omitted in the Revised Version (British and American). "To be privy to a thing" (1 Ki 2:44; Acts 5:2) is simply "to know" it; in The Wisdom of Solomon 8:4, the Revised Version (British and American) has changed the phrase into "be initiated into."
Also see definition of "Privily" in Word Study