Afsluit = "close off". Dijk = "dike" (pronounced the same too). It's a 20 mile long dike we've built that closes off what used to be the South Sea from the North Sea, turning it into a big lake that's called the IJsselmeer.

IJ is pronounced ei isn't it? The wonder of Nederlandse Taal..

It's all the QWERTY home-row letters making it look that way, I think. Does look a lot like a quick slam of the fingers on the keyboard to generate a "random" string.

maybe using qwerty is closer to Dvorak in that locale

I had to do the same slow down and re-read that, as it looks a lot like a username I've used when slamming keys for a Zoom meeting.

Wait until you look up Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

wow, I thought you were joking

And now for the grand reveal of someone pronouncing it! https://youtu.be/fHxO0UdpoxM