Tell me the meaning of the word "vicissitude".
The word "vicissitude" refers to a change in circumstances or fortune, typically one that is unwelcome or unpleasant. It can also refer to the natural changes or variations that occur in the course of life or nature.
Complete the following task based on the instruction and optional input provided.### Instruction:
Tell me the meaning of the word "vicissitude".

### Output:
The word "vicissitude" refers to a change in circumstances or fortune, typically one that is unwelcome or unpleasant. It can also refer to the natural changes or variations that occur in the course of life or nature.