De or het koepokinenting?

The correct Dutch article is:

de koepokinenting

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

How to use koepokinenting

the koepokinentingde koepokinenting
this koepokinentingdeze koepokinenting
that koepokinentingdie koepokinenting
our koepokinentingonze koepokinenting
your koepokinentingjouw koepokinenting
every koepokinentingelke koepokinenting
which koepokinenting?welke koepokinenting?
a big koepokinenting / the big koepokinentingeen grote koepokinenting, de grote koepokinenting