adjectivenounnoun

dangereux

dangerous

Qui peut causer du mal, des blessures ou des problèmes.

Definition & meaning

Dangereux means dangerous: likely to cause harm, injury, or damage. It can describe a person, situation, object, or action.

It can also mean risky or hazardous when an action may have undesirable consequences.

Grammar & Word origin

An adjective with four forms:

  • Masculine singular: dangereux
  • Feminine singular: dangereuse
  • Masculine plural: dangereux
  • Feminine plural: dangereuses

It comes from danger plus the adjective-forming suffix -eux.

Synonyms & antonyms

Synonyms:

  • risqué — risky; emphasizes the possibility of a bad outcome rather than an inherent danger.
  • périlleux — perilous; more literary and often suggests serious danger.
  • nocif — harmful; emphasizes an injurious effect, especially on health or the environment.

Antonyms:

  • sûr — safe or secure.
  • inoffensif — harmless; unlikely or unable to cause harm.

Common phrases & collocations

  • un animal dangereux — a dangerous animal
  • une situation dangereuse — a dangerous situation
  • dangereux pour la santé — dangerous to health
  • conduire dangereusement — to drive dangerously; dangereusement is the related adverb.

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Examples

Ce chien est dangereux.adjective

This dog is dangerous.

Ce serpent semble très dangereux.adjective

This snake looks very dangerous.

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