Etymology
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prevention (n.)

mid-15c., prevencioun, "action of stopping an event or practice," from Medieval Latin preventionem (nominative preventio) "action of anticipating; a going before," noun of action from past-participle stem of Latin praevenire "come or go before, anticipate" (see prevent). Original sense in English now is obsolete; the meaning "act of hindering or rendering impossible by previous measures" is from 1660s.

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Definitions of prevention

prevention (n.)
the act of preventing;
money was allocated to study the cause and prevention of influenza
Synonyms: bar
From wordnet.princeton.edu