A measure or action taken to stop something undesirable from happening.
Examples:
Regular exercise is a crucial preventative measure.The vaccine acts as a preventative against the flu.Reading before bed is a preventative for insomnia.
Synonyms:
Antonyms:
Preventive
/prɪˈventɪv/
Intended to stop something from happening
Examples:
Vaccinations are a key part of preventive healthcare.The company deployed preventive measures against cyber threats.Preventive actions can mitigate risks in project management.
Synonyms:
Antonyms:
Ways to tell them apart:
Both words are used in the context of stopping something undesirable from happening, but differ slightly in form.
Preventive is the shorter and more traditional form, which is more commonly used in both American and British English.
Preventative is a longer form that some prefer, but it's less common.
Remember that both words mean the same thing, and the choice between them is often a matter of preference.
Use preventive if you want the shorter and more classic version of the word.