privity

noun6

1. •
   The fact of being privy to something; knowledge, compliance.

   • But this acknowledgement was made without the privity of his wife, whose vicious aversion he was obliged, in appearance, to adopt. — 1751
2. •
   A relationship between parties seen as being a result of their mutual interest or participation in a given transaction, e.g. contract, estate, etc.

   • There is no privity, (as the lawyers say),—that is, no mutual recognition, consent and agreement—between those who take these oaths, and any other persons. — 1870
3. •
   (no longer used) A divine mystery; something known only to God, or revealed only in holy scriptures.
4. •
   (no longer used) Privacy, secrecy.

   • Him oft and oft I askt in priuitie, / Of what loines and what lignage I did spring[…]. — 1590
5. •
   (no longer used) A private matter, a secret.
6. •
   [in the plural] (no longer used) The genitals.

   • Having ended the delights of nature, they were wont to wipe their privities [translating catze] with perfumed wooll. — 1603