polder

marskimaa, polderi puhekieltä An area of ground reclaimed from a sea or lake by means of dikes. (defdate)
1999, (w), translating Geert Mak, Amsterdam: A Brief Life of the City, Vintage 2001, p. 43:

The patron saint of the Oude Kerk, Saint Nicolaas, the ‘water saint’, was also very popular, as he protected the sailors and those living on the polders from the dangers of the sea.