“promise to love her for better or for worse”; why FOR?
" promise to love her for better or for worse"

That's from a wedding ceremony and I kinda know what that means, but I was wondering why did they use 'for' here. Could you find and show me the same usage of 'for' from any dictioniary entry?

Question

“promise to love her for better or for worse”; why FOR?
" promise to love her for better or for worse"

That's from a wedding ceremony and I kinda know what that means, but I was wondering why did they use 'for' here. Could you find and show me the same usage of 'for' from any dictioniary entry?

Answer

"for better or for worse" is  a common expression. It's better to learn 'the expression' rather than try and break it down. It means "whether in good times or in bad times" or "no matter what happens".