Translation of vereinbar

Hans was not in the office for 4 days. I informed him that it is urgent and asked him to send it by tomorrow morning. I'll do my best that you receive it as early as possible. Trust me on that.
We had time to walk around the waterfall but refrained from entering the little lake at the bottom. My fellow tourtakers were quiet nice and we spend a while just sitting in the grass near the water.
Once at the island we climbed up the limestone mountain and got a superb view of the entire bay area. The cave by itself was also impressive and our guide explained about how this cave was discovered.