Final answer:
The agent that inhibits the growth of microorganisms but doesn't necessarily kill them contains the suffix -static.
Step-by-step explanation:
The agent that stops or inhibits the growth of microorganisms but does not necessarily kill them contains the suffix -static. For example, a treatment that inhibits the growth of molds and yeast would be considered fungistatic. The suffix -static is used to indicate methods that make the population of microorganisms static, or stop their growth, rather than killing them.