in·ti·ma·cy /ˈɪntəməsi/
  親密,熟悉,親昵行為
  In·ti·ma·cy n.; pl. Intimacies   The state of being intimate; close familiarity or association; nearness in friendship.
  Syn: -- Acquaintance; familiarity; fellowship; friendship. See Acquaintance.
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  intimacy
       n 1: close or warm friendship; "the absence of fences created a
            mysterious intimacy in which no one knew privacy" [syn:
            familiarity, closeness]
       2: a usually secretive or illicit sexual relationship [syn: affair,
           affaire, liaison, involvement, amour]
       3: a feeling of being intimate and belonging together; "their
          closeness grew as the night wore on" [syn: closeness]