Added 9 October 2026 inhibitor /ɪnˈhɪbɪtɚ/ noun Categories: NatureUncommon Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about inhibitor at Wordnik → Where our words come from → A substance that retards or stops an activity. Related Words: inhibitoryinhibitioninhibitobstaclerestraintstabilizerblockerproteinaseglutaminecox-2inhibitingrestrainer Back to today's word