Webster’s Revised Unabridged Dictionary · 1913
Familiarity
Fa·mil′iar′i·ty (fȧ·mĭl′yăr′ĭ·ty̆ or ·ĭ·ăr′ĭ·ty̆; 277), n.; pl. Familiarities (#). [OE. familarite, F. familiaritéfr. L. faniliaritas. See Familiar.] 1. 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.
2. 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.
Syn. — Acquaintance; fellowship; affability; intimacy. See Acquaintance.