catalyst

Definitions

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

A person or thing that precipitates an event or causes significant change.

Examples

The sudden change in leadership served as a catalyst for innovation within the company.

The high interest rates acted as a catalyst for the recent downturn in the housing market.

Synonyms

stimulus impetus spark trigger incentive motivation activator

Antonyms

preventative deterrent hindrance blocker inhibitor obstacle restraint