prone /ˈpron/
  (a.)傾斜的,有…傾向的,易于…的
  prone /ˈpron/ 形容詞
  傾向,有…傾向的,旋前的,俯的
  Prone a.
  1. Bending forward; inclined; not erect.
  Towards him they bend
  With awful reverence prone.   --Milton.
  2. Prostrate; flat; esp., lying with the face down; -- opposed to supine.
  Which, as the wind,
  Blew where it listed, laying all things prone.   --Byron.
  3. Headlong; running downward or headlong. “Down thither prone in flight.”
  4. Sloping, with reference to a line or surface; declivous; inclined; not level.
  Since the floods demand,
  For their descent, a prone and sinking land.   --Blackmore.
  5. Inclined; propense; disposed; -- applied to the mind or affections, usually in an ill sense. Followed by to. “Prone to mischief.”
     Poets are nearly all prone to melancholy.   --Landor.
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  prone
       adj 1: lying face downward [syn: prostrate]
       2: having a tendency (to); often used in combination; "a child
          prone to mischief"; "failure-prone"