Phrase - informal :شخص یا چیز اصلی دردسر سازعامل اصلیِ مشکل سازدلیل اصلیِ به وجود آمدن مشکلبه عنوان مثال :When the minister was forced to resign, the press was generally seen as the villain of the pieceمنابع• https://dictionary.cambridge.org/dictionary/english/villain-of-the-piece• https://www.ldoceonline.com/dictionary/the-villain-of-the-piece+ عکس و لینک
