De or het polderblindheid?

The correct Dutch article is:

de polderblindheid

Rule Words ending in -heid: almost always de. See the rule

How to use polderblindheid

the polderblindheidde polderblindheid
this polderblindheiddeze polderblindheid
that polderblindheiddie polderblindheid
our polderblindheidonze polderblindheid
your polderblindheidjouw polderblindheid
every polderblindheidelke polderblindheid
which polderblindheid?welke polderblindheid?
a big polderblindheid / the big polderblindheideen grote polderblindheid, de grote polderblindheid