V-ERG
(使)(牛奶或鸡蛋)凝结；（使）结成凝乳
If milk or eggs curdle or if you curdle them, they separate into different bits.
例句
The sauce should not boil or the egg yolk will curdle...
调味汁不能煮沸，不然蛋黄会凝结的。
The herb has been used for centuries to curdle milk.
那种香草几个世纪以来都被用来制作酸乳。