If something is inhibited it's held back or kept from doing something. An inhibited infection is kept from spreading, possibly by antibiotics.
We often use the word inhibited to describe someone’s behavior, especially if that person is self-conscious about doing something, but it also describes the simple fact of being restrained. If you washed your pants in hot water and they shrank and you could just barely squeeze them on, your movement would be inhibited. The Latin root of inhibited is inhibere, "to hold in or hold back."