A more thorough explanation:

Term: e converso
Definition: E converso means the opposite or the contrary. It is used to introduce a contrasting idea or to show that the opposite is also true.
Examples:
- I thought the movie was going to be terrible, but e converso, it was actually really good. (This sentence shows that the speaker's initial expectation was the opposite of what actually happened.)
- The company's profits have been increasing steadily. E converso, their expenses have been decreasing. (This sentence shows that the two ideas are opposite but related.)
- I used to think that exercise was a waste of time. E converso, now I can't imagine not working out every day. (This sentence shows a change in opinion, where the opposite of the speaker's initial belief is now true.)