reactive

réactif

Qui réagit à ce qui se passe, souvent au lieu de prévoir ou d’agir à l’avance.

En anglais simple : Responding to something that happens, often instead of planning or acting first.

• Their approach is too reactive.
• Her skin is highly reactive to strong sunlight.
• The team moved from reactive decisions to careful planning.

Comment l'utiliser : reactive to something (These cells are reactive to changes in temperature.)

Synonymes : responsive

Contraires : proactive

Expressions courantes : reactive approach, reactive to something, reactive policy

réactif

Qui se combine ou se transforme facilement au contact d’une autre substance chimique.

En anglais simple : Able to combine or change easily when in contact with another chemical substance.

• Sodium is a reactive metal.
• This gas is highly reactive with oxygen.
• Less reactive metals are easier to store safely.

Comment l'utiliser : reactive with something (The metal is highly reactive with water.)

Synonymes : chemically active

Contraires : inert

Expressions courantes : reactive metal, highly reactive, chemically reactive