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"flammable" vs "inflammable"

Both 'flammable' and 'inflammable' are correct, but they have opposite meanings. 'Flammable' means easily set on fire, while 'inflammable' means the same thing. However, 'inflammable' is less commonly used due to confusion with the prefix 'in-' which usually means 'not'.

Last Updated: March 20, 2024

flammable

This is correct and commonly used in English.

Use 'flammable' to describe something that can easily catch fire or burn.

Examples:

  • Gasoline is highly flammable.
  • Be careful with flammable materials near open flames.

Alternatives:

  • combustible
  • ignitable
  • inflammable
  • ignitable
  • fire-prone

inflammable

This is correct but less commonly used due to potential confusion.

Although 'inflammable' means the same as 'flammable' (easily set on fire), it is less common due to the potential confusion with the prefix 'in-' which usually means 'not'.

Examples:

  • The fabric is inflammable and should be kept away from heat sources.
  • The warning label indicates that the substance is inflammable.

Alternatives:

  • flammable
  • combustible
  • ignitable
  • fire-prone
  • easy to ignite

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