Familiarity

Webster's Dictionary of the English Language

·noun Anything said or done by one person to another unceremoniously and without constraint; ·esp., in the ·pl, such actions and words as propriety and courtesy do not warrant; liberties.

II. Familiarity ·noun The state of being familiar; intimate and frequent converse, or association; unconstrained intercourse; freedom from ceremony and constraint; intimacy; as, to live in remarkable familiarity.