English Reference
adjective · noun

preventive

adj. · n.
US /pɹiˈvɛnɪv/ UK /pɹɪvˈɛntɪv/ pre·ven·tive UK spelling preventives

  1. 01 B2 Upper Intermediate

    adj.intended to stop something bad from happening.

    adj.intended to forestall or inhibit the occurrence of an undesirable event or condition.

    Simple

    The company took preventive measures to make sure the machines didn't break down.

    In context

    The security team implemented preventive protocols to mitigate the risk of a data breach before any vulnerabilities could be exploited.

    Usage

    Often used in the phrase 'preventive measures' or 'preventive action'.

  2. 02 B2 Upper Intermediate Medicine

    adj.used to stop an illness or health problem before it begins.

    adj.relating to the inhibition of disease or the slowing of its development; synonymous with prophylactic.

    Simple

    Regular exercise and a healthy diet are important for preventive medicine.

    In context

    The clinic focuses on preventive healthcare, offering screenings that detect potential issues while they are still manageable.

    Teacher's tip

    Learners may see 'preventative' used in the same way; both are correct, though 'preventive' is often preferred in technical and medical writing.

    prophylacticprotective
    curativetherapeutic
  3. 03 C1 Advanced Formal

    n.something that you do or take to stop a problem.

    n.a measure, drug, or device used to prevent an undesirable event or disease.

    Simple

    The doctor suggested a daily vitamin as a preventive against the flu.

    In context

    While the new law is a useful preventive, it does not address the root causes of the social unrest.

    Usage

    Usually functions as a countable noun.

This is not because more children are getting sick, but because they can no longer access preventive and community-based nutrition services previously available to them.

UN News· 21 Aug 2026

These include the ship's crew, pilots, charterers, managers and people taking preventive measures.

Phys.org· 21 Aug 2026

Borrowed from New Latin praeventīvus. Equivalent to prevent + -ive.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin la-new praeventīvus
Level B2 · Upper Intermediate
Frequency Frequent
Updated