Word parts un- + likely Pronunciation IPA (key): /ʌnˈlaɪkli/ Audio (US)(file) Audio (UK)(file) Adjective Positive unlikely Comparative unlikelier Superlative unlikeliest Positive unlikely Comparative more unlikely Superlative most unlikely If something is unlikely, then it probably will not happen. Antonym: likely It's unlikely that it will rain today.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads