inhibitor

plural inhibitors

1. One who, or that which, inhibits.

   I found daily meditation to be a useful inhibitor of negative thoughts.

2. chemistryAny substance capable of stopping or slowing a specific chemical reaction.

   1 more example

   The class of antidepressants most commonly associated with sexual dysfunction is selective serotonin reuptake inhibitors, or SSRIs, which treat depression by ultimately increasing levels of the neurotransmitter serotonin in the brain. […] A common solution is switching to bupropion, which is a norepinephrine-dopamine reuptake inhibitor, or NDRI.

   2024 March 21, Kristen Rogers, “If antidepressants are killing your sex life, here’s what you can do”, in CNN

3. biologyAny substance capable of stopping or slowing a specific biological process.