preventative/prɪˈvɛntətɪv/1预防性的remedy that prevents or slows the course of an illness or disease同义词： preventiveprophylactic2避孕药, 预防性的an agent or device intended to prevent conception同义词： preventivecontraceptive deviceprophylactic devicecontraceptivebirth control device3障碍，阻碍any obstruction that impedes or is burdensome同义词： hitchinterferencepreventivehinderanceencumbrancehindranceincumbrance