ferment
verb [ I or T ] uk/fəˈment/ us/fɚˈment/
（使）发酵
If food or drink ferments or if you ferment it, the sugar in it changes into alcohol because of a chemical process.
You make wine by leaving grape juice to ferment until all the sugar has turned to alcohol. 酿葡萄酒是让葡萄汁发酵，直到所有的糖分都转化为酒精。
ferment
noun [ U ] literary uk/ˈfɜː.ment/ us/ˈfɝː.ment/
纷扰;骚动;动乱
a state of confusion, change, and lack of order or fighting
The resignation of the president has left the country in ferment. 总统辞职导致国家处于动乱之中。