inhibitor
/ɪnˈhɪbɪtər/Definitions
1. noun
a substance or agent that prevents or slows down a chemical reaction or biological process
“The enzyme was an inhibitor of the metabolic pathway, causing the cell to slow down.”
2. noun
a device or system that prevents or limits the flow of something, such as a liquid or gas
“The inhibitor valve in the engine prevented the fuel from flowing when it was not needed.”
3. verb
to prevent or slow down a chemical reaction or biological process
“The medicine inhibits the growth of bacteria in the body.”