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English to English noun
| 1 |
a variation in circumstances or fortune at different times in your life or in the development of something |  | Example: the project was subject to the usual vicissitudes of exploratory research
source: wordnet30
| 2 |
mutability in life or nature (especially successive alternation from one condition to another) | | source: wordnet30
| 3 |
Regular change or succession from one thing to another; alternation; mutual succession; interchange. | | source: webster1913
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