I am reading the lyrics to a song by the Belgian Dutch-speaking band Clouseau, and they have these lyrics in chorus: Laat de regen maar komen. Laat het gieten in stromen. Voor altijd. Voor altijd. What function does the “maar” do here? Is it a modal particle?

I'm studying German and I feel the need to learn vocab and sentences as well on the same cards. Basically my technique is to find a sentence not so long, break the vocab down and put it all on the cards as shown below: I have doubts to this technique, because my brain might extrapolate the rem...