prevention

When an action stops something from happening, like assigning extra teachers to watch a playground during recess to prevent bullying, it's called prevention.

The noun prevention comes up most often when people are trying to keep something bad in check, like crime, disease, or forest fires. Educating kids about nutrition is one form of obesity prevention, for example, and lowering speed limits can help with accident prevention. The word prevent is at the root of prevention, and it comes from the Latin praeventus, "anticipate or hinder."

Definitions of prevention
1

n the act of preventing

“money was allocated to study the cause and prevention of influenza”
Synonyms:
bar
Types:
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averting
the act of preventing something from occurring
debarment
the act of prevention by legal means
disqualification
the act of preventing someone from participating by finding them unqualified
interception
the act of intercepting; preventing something from proceeding or arriving
non-proliferation, nonproliferation
the prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons)
forestalling, obviation, preclusion
the act of preventing something by anticipating and disposing of it effectively
prophylaxis
the prevention of disease
save
(sports) the act of preventing the opposition from scoring
crushing, quelling, stifling, suppression
forceful prevention; putting down by power or authority
suspension, temporary removal
a temporary debarment (from a privilege or position etc)
recusal, recusation
(law) the disqualification of a judge or jury by reason of prejudice or conflict of interest; a judge can be recused by objections of either party or judges can disqualify themselves
crackdown
severely repressive actions
Type of:
hinderance, hindrance, interference
the act of hindering or obstructing or impeding

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