vicissitudes of the world; world's sudden changes
A rare, literary term for the unpredictable and drastic changes that occur in the world, often with a sense of impermanence. Not used in everyday conversation.
The phrase '桑海の変' expresses the drastic changes of the world.
An abbreviated allusion to the classical Chinese expression 桑田滄海, “mulberry fields become blue seas,” a metaphor for sweeping worldly change.