hes·i·tan·cy /-tən(t)si/
  遲疑;躊躇;猶豫
  Hes·i·tan·cy n.
  1. The act of hesitating, or pausing to consider; slowness in deciding; vacillation; also, the manner of one who hesitates.
  2. A stammering; a faltering in speech.
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  hesitancy
       n 1: a feeling of diffidence about doing something [syn: hesitance]
       2: a certain degree of unwillingness; "a reluctance to commit
          himself"; "after some hesitation he agreed" [syn: reluctance,
           hesitation, disinclination, indisposition]