What is this word?
Maybe we know the man's name דָּן, Dan, one of the Patriarchs, a Jacob's son (last word in Gen 30:6). For this sense look at word number 622.
But surely this is not the meaning of our word in this context.
What then? We should know verb דִּין, judge and also deal with.
Look at N-d10.H.2.a
So we have (he) dealt with.