inhibitory

/ɪnˈhɪbɪtɔri/
adjective
  1. Having the effect of preventing, slowing, or restricting a process or function, especially in biology or chemistry.
    • The inhibitory signals in the brain help prevent overstimulation.
    • Certain plants produce inhibitory chemicals to protect themselves from insects.
    • The drug has an inhibitory effect on the growth of cancer cells.