any obstruction that impedes or is burdensome

tending to prevent or hinder

remedy that prevents or slows the course of an illness or disease; "the doctor recommended several preventatives"

preventing or contributing to the prevention of disease; "preventive medicine"; "vaccines are prophylactic"; "a prophylactic drug"

Preventative controls aim to deter and avoid undesirable events from taking place.

That which prevents; -- incorrectly used instead of preventive.

Preventative is a general word meaning to prevent or stop an action from happening

Although it is not a word, it is often used instead of preventive, which is a word. See preventive.

Routine maintenance designed to prevent sewer system maintenance problems.

an agent or device intended to prevent conception