fa·mil·iar·i·ty 
(fə-mĭl′yărĭ-tē, -mĭl′ē-ăr-)
(fə-mĭl′yărĭ-tē, -mĭl′ē-ăr-)n. pl. fa·mil·iar·i·ties
1.
a. Acquaintance with or knowledge of something: I have little familiarity with that software program.
b. The quality of being known from past experience: The familiarity of the buildings made us realize that we must be near the hotel.
2. Established friendship or intimacy: cooperation that came easily because of the partners' familiarity.
3.
a. Improper or unduly intimate friendliness; forwardness: found the familiarity of the sales clerk offensive.
b. An act characterized by forwardness.