un·be·liev·able 
/ˌʌnbəˈli:vəbəl/ adjective
/ˌʌnbəˈli:vəbəl/ adjective [more unbelievable; most unbelievable] 1 : difficult or impossible to believe
▪ His story/explanation is unbelievable. 2 — used to describe something that is so good, bad, etc., that it is difficult to believe ▪ The destruction was unbelievable. ▪ He made an unbelievable catch in center field.
▪ His story/explanation is unbelievable.
— un·be·liev·ably /ˌʌnbəˈli:vəbli/ adverb
▪ an unbelievably bizarre story ▪ He's an unbelievably [=amazingly] fast runner.
/ˌʌnbəˈli:vəbli/ adverb ▪ an unbelievably bizarre story ▪ He's an unbelievably [=amazingly] fast runner.
