a·brupt /əˈbrʌpt/ 形容詞
  突然的, 唐突的, 陡峭的, 不連貫的, 無禮的
  Ab·rupt a.
  1. Broken off; very steep, or craggy, as rocks, precipices, banks; precipitous; steep; as, abrupt places. “Tumbling through ricks abrupt,”
  2. Without notice to prepare the mind for the event; sudden; hasty; unceremonious. “The cause of your abrupt departure.”
  3. Having sudden transitions from one subject to another; unconnected.
     The abrupt style, which hath many breaches.   --B. Jonson.
  4. Bot. Suddenly terminating, as if cut off.
  Syn: -- Sudden; unexpected; hasty; rough; curt; unceremonious; rugged; blunt; disconnected; broken.
  Ab·rupt n.  An abrupt place. [Poetic]    =\“Over the vast abrupt.”\=   --Milton.
  Ab·rupt, v. t. To tear off or asunder. [Obs.] “Till death abrupts them.”
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  abrupt
       adj 1: marked by sudden changes in subject and sharp transitions;
              "abrupt prose" [syn: disconnected]
       2: exceedingly sudden and unexpected; "came to an abrupt stop";
          "an abrupt change in the weather"
       3: extremely steep; "an abrupt canyon"; "the precipitous rapids
          of the upper river"; "the precipitous hills of Chinese
          paintings"; "a sharp drop" [syn: precipitous, sharp]
       4: surprisingly and unceremoniously brusque in manner; "an
          abrupt reply"