I'm new to this site, so if this question is inappropriate, please let me know in the comments and I can take it down.
I am used to seeing the word "si" used as the English word "if". For example: "Si tu n'existais pas, dis-moi pourquoi j'existerais?".
Today someone wrote to me "pas si mal" which I understand means "not so bad". I do see in various dictionaries that "si" can mean "so", but it seems 99% of the time I saw the word "si", it was used for the word "if". Furthermore, I would think there's several alternative ways to say the word "so" that are "better" than using the word "si".
Therefore, I wonder what other examples there are, where it would be appropriate to use the word "si" like it's used to say "so" in "pas si mal"?
This question: What's the function of the word "si" in this sentence?, talks about the use of "si" in general, and the answers mainly talk about the use of the word "si" that I'm used to (which is to say "if"), so my question is a bit more specific.