Müttefikler Ruslara yardımcı olmak için çok inandırıcı olmayan bir girişimde bulundular. - The Allies made a very unconvincing attempt to help the Russians.
If you describe something such as an argument or explanation as unconvincing, you find it difficult to believe because it does not seem real. Mr Patel phoned the University for an explanation, and he was given the usual unconvincing excuses To many readers it sounded unconvincing. convincing + unconvincingly un·con·vinc·ing·ly `It's not that I don't believe you, Meg,' Jack said, unconvincingly
If you describe a story or a character in a story as unconvincing, you think they do not seem likely or real. an unconvincing love story. convincing. failing to make you believe that something is true or real