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réagir

/ʁe.a.ʒiʁ/
verb★Intermediate— to react
general

To respond to a stimulus, event, or situation, often emotionally or physically.

Les enfants réagissent vite aux bruits forts.

Children react quickly to loud noises.

💡

The verb 'réagir' is often used to describe emotional or physical responses to external stimuli.

🏥Medicine
technical

To respond to a chemical or biological stimulus, often in a scientific or medical context.

Le corps réagit aux allergènes en produisant des anticorps.

The body reacts to allergens by producing antibodies.

💡

In medical contexts, 'réagir' can describe physiological responses to substances or conditions.

Collocations

réagir avecto react withréagir àto react toréagir viteto react quickly

Synonyms

répondres'emporters'adapter

Antonyms

ignorerrester indifférent

Related Phrases

réagir au quart de tourphrase
to react quickly and sharply
réagir avec excèsphrase
to overreact

💡Pro Tip

Common Usage

'Réagir' is often followed by the preposition 'à' when referring to a stimulus or event.

⚡Gold Rule

Preposition Choice

Use 'à' after 'réagir' when referring to a specific stimulus or event.

📖Word Origin

From the Latin 're-' (back) and 'agere' (to act), meaning 'to act back' or 'to respond'.

📝Usage Notes

'Réagir' is commonly used in everyday language to describe emotional or physical responses. In scientific contexts, it can refer to chemical or biological reactions.

Word Breakdown

ré-
back, again
prefix
+
-agir
to act
root
Dictionnaire Français-Anglais

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