The simple definition of worsen is to become or make something worse. However, in all the examples that I have seen, I noticed that the things being worsened had already been bad in the first place. For example:
The problem has worsened considerably in recent months.
Her symptoms have worsened c...
Related to the above question, I wonder what everyone thinks of this sentence: "In her first year of university, she got very good grades, but in her second year, she became addicted to video games and her grades began to worsen."
It sounds fine to me, and it's describing something going from good to bad. It seems like most of the answers are saying that that's not okay—"worsen" should only describe things going from bad to worse.
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