catalyst

Definition

A substance that increases the rate of a chemical reaction without being consumed; also refers to an agent that precipitates change.

हिन्दी चेतना बढ़ाने वाली वस्तु जो किसी रासायनिक प्रतिक्रिया की दर को बढ़ाती है बिना खत्म होने के

Example

"Her speech was the catalyst that sparked the social reform movement."