abruptness
  突然,唐突
  Ab·rupt·ness, n.
  1. The state of being abrupt or broken; craggedness; ruggedness; steepness.
  2. Suddenness; unceremonious haste or vehemence; as, abruptness of style or manner.
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  abruptness
       n 1: an abrupt discourteous manner [syn: brusqueness, curtness,
             gruffness, shortness]
       2: the property possessed by a slope that is very steep [syn: precipitousness,
           steepness] [ant: gradualness]
       3: the quality of happening with headlong haste or without
          warning [syn: precipitateness, precipitance, precipitancy,
           suddenness]