8 Wintry Words to Defrost Your Vocabulary
1868 in scientific use (earlier as a Scottish legal term), agent noun in Latin form from inhibit.
inhibitor in·hib·i·tor or in·hib·it·er (ĭn-hĭb'ĭ-tər)n.
A substance that restrains or retards physiological, chemical, or enzymatic action.
A nerve whose stimulation represses activity.