Translation of diluir

I really worry about the health of obese people, especially the ones that I know in person (friends, relatives), because it is well known that overweight have a higher probability of heart attack.
When I finally arrived at my destination I still had the task of finding an accommodation. As my acquaintances where with me we started looking together, however we discovered that we were not on the same budget.
The young women rowed towards us and tried to sell food and souvenirs. We were not interested and she tried to block us and prevent us from swimming back to our vessel. So we dove beneath her.