UNSUCCESSFUL /ˌʌnsəkˈsɛsfl̩/ Scrabble 19 Words With Friends 26 Definition adjective not successful. adjective failing to accomplish an intended result. — synonyms: abortive, stillborn Examples “His unsuccessful attempt earned him sympathy, condolences, and an occasional good-natured ribbing.” See all 99 words you can make from UNSUCCESSFUL → 12-letter words Words starting with U Words ending with L ← Unscramble different letters