De or het ontbundeling?

The correct Dutch article is:

de ontbundeling

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

How to use ontbundeling

the ontbundelingde ontbundeling
this ontbundelingdeze ontbundeling
that ontbundelingdie ontbundeling
our ontbundelingonze ontbundeling
your ontbundelingjouw ontbundeling
every ontbundelingelke ontbundeling
which ontbundeling?welke ontbundeling?
a big ontbundeling / the big ontbundelingeen grote ontbundeling, de grote ontbundeling