no end of trouble for the future; there will be no end of disastrous aftermaths; there will be serious consequences
❍ 有人大声叫道： “不杀蒋介石～。”周恩来同志回答说： “杀还不容易，一句话就行了。” (《敬爱的周总理我们永远怀念您》Ⅱ—41) When one of them cried out，“There will be serious consequences if we don’t put Jiang Jieshi to death.” Comrade Zhou replied:“That’s easy. One word will do if you order the death of Jiang.”
后患无穷
endless trouble to come; no end of trouble in the future;fraught with danger ever afterwards
后患无穷hòu huàn wú qiónɡ
给将来留下的祸患无穷无尽。no end of trouble for the future, there will be no end of disastrous aftermaths, bring sb. trouble without end