Unbelievable

прилагательное невероятный, неправдоподобный Например: It's unbelievable to me that she would commit such a blunder. — Мне трудно поверить, что она могла сделать такую грубую ошибку. Синоним(ы): incredible, inconceivable

Большой англо-русский словарь

Unbelievable

adjective too improbable for belief Example: the plot is unreal and unbelievable; also of such a superlative degree as to be hard to believe Example: the destruction was unbelievable Example: made an unbelievable catch in center fieldunbelievably adverb

Merriam-Webster's Collegiate Dictionary