fa·mil·iar·i·ty /fəˌmɪliˈ(j)ærəti, ˌmɪlˈjær-/
 親密,熟悉,精通


 Fa·mil·iar·i·ty n.; pl. Familiarities
 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.

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 familiarity
      n 1: personal knowledge or information about someone or something
           [syn: acquaintance, conversance, conversancy]
      2: usualness by virtue of being familiar or well known [ant: unfamiliarity]
      3: close or warm friendship; "the absence of fences created a
         mysterious intimacy in which no one knew privacy" [syn: intimacy,
          closeness]
      4: a casual manner [syn: casualness]
      5: an act of undue intimacy [syn: impropriety, indecorum, liberty]