pre·ven·ta·tive /-ˈvɛntətɪv/
 預防


 pre·ven·ta·tive /prɪˈvɛntətɪv/ 形容詞 名詞
 預防的,預防法,預防劑


 Pre·vent·a·tive n. That which prevents; -- incorrectly used instead of preventive.

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 preventative
      adj 1: tending to prevent or hinder [syn: preventive] [ant: permissive]
      2: preventing or contributing to the prevention of disease;
         "preventive medicine"; "vaccines are prophylactic"; "a
         prophylactic drug" [syn: preventive, prophylactic]
      n 1: remedy that prevents or slows the course of an illness or
           disease; "the doctor recommended several preventatives"
           [syn: preventive, prophylactic]
      2: any obstruction that impedes or is burdensome [syn: hindrance,
          hitch, preventive, encumbrance, incumbrance, interference]
      3: an agent or device intended to prevent conception [syn: contraceptive,
          preventive, contraceptive device, {prophylactic
         device, birth control device]