De or het verfrommeling?

The correct Dutch article is:

de verfrommeling

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

How to use verfrommeling

the verfrommelingde verfrommeling
this verfrommelingdeze verfrommeling
that verfrommelingdie verfrommeling
our verfrommelingonze verfrommeling
your verfrommelingjouw verfrommeling
every verfrommelingelke verfrommeling
which verfrommeling?welke verfrommeling?
a big verfrommeling / the big verfrommelingeen grote verfrommeling, de grote verfrommeling