im·per·il /ɪmˈpɛrəl/
  (vt.)使處于危險,危害
  Im·per·il v. t. [imp. & p. p. Imperiled or Imperilled; p. pr. & vb. n. Imperiling or Imperilling.] To bring into peril; to endanger.
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  imperil
       v : pose a threat to; present a danger to; "The pollution is
           endangering the crops" [syn: endanger, jeopardize, jeopardise,
            menace, threaten, peril]