De or het wedervergelding?

The correct Dutch article is:

de wedervergelding

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

How to use wedervergelding

the wedervergeldingde wedervergelding
this wedervergeldingdeze wedervergelding
that wedervergeldingdie wedervergelding
our wedervergeldingonze wedervergelding
your wedervergeldingjouw wedervergelding
every wedervergeldingelke wedervergelding
which wedervergelding?welke wedervergelding?
a big wedervergelding / the big wedervergeldingeen grote wedervergelding, de grote wedervergelding