CEFR B2

catalyst

noun

Meaning

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change, or an event or person that causes or accelerates a major change or action.

Examples

The enzyme acts as a catalyst in biological processes.
His resignation was the catalyst that finally led to the government's downfall.

Synonyms: agent, stimulus, impetus, spark

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catalyst (B2)

noun

Pronunciation: /ˈkætəlɪst/

Definition

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change, or an event or person that causes or accelerates a major change or action.

Examples

The enzyme acts as a catalyst in biological processes.
His resignation was the catalyst that finally led to the government's downfall.
The discovery of penicillin served as a catalyst for a revolution in medicine.

How to Use catalyst

catalyst for (prepositional phrase): Something that causes or accelerates a change or action. — "The invention of the printing press was a catalyst for the spread of knowledge."

Synonyms of catalyst

Words with a similar meaning to catalyst:

Antonyms of catalyst

Words with the opposite meaning to catalyst:

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