Word family adjective convinced ≠ unconvinced convincing ≠ unconvincing verb convince adverb convincingly ≠ unconvincingly
From Longman Dictionary of Contemporary Englishunconvincingun‧con‧vinc‧ing /ˌʌnkənˈvɪnsɪŋ◂/ adjective failing to make you believe that something is true or real an unconvincing smile an unconvincing explanation Some readers will find the arguments unconvincing. —unconvincingly adverbExamples from the Corpus
unconvincing• She says she is enjoying her new life in Tokyo, but the tone of her voice is utterly unconvincing.• The Friends, who accepted her as a member, found her unconvincing and turned her down as a minister.• But for all of these gestures, Samper remains an unconvincing anti-drug crusader.• Peter came to me with a rather unconvincing apology.• Unfortunately, the cast is part of the problem, with Mark Greenstreet downright unconvincing as Holmes.• The House found that an unconvincing explanation.• This leads to a slightly bizarre and unconvincing fusion of musical forces which all end up clumped awkwardly together.• Their denial was unconvincing in view of the physical evidence linking them to the bombing.• Some of the description is superb, but the climbing remains unconvincing, slipping too easily into melodrama and strange terminology. 