familiarity

noun4

1. •
   Close or habitual acquaintance with someone or something; understanding or recognition acquired from experience.

   • The objects around have been seen so often, that they have at last become, as it were, unseen; their familiarity does not carry us out of ourselves, for all their associations are our own. — 1837
2. •
   The state of being extremely friendly; intimacy.

   • Do not keep familiarity with any but those, with whom you may improve your time. — 1677
3. •
   An instance of familiar behaviour.

   • The gaunt men carried swords and daggers with a new familiarity, and even the women had poniards belted at their waists. — 2003
4. •
   Undue intimacy; inappropriate informality, impertinence.