De or het substantivering?

The correct Dutch article is:

de substantivering

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) het substantiveren

How to use substantivering

the substantiveringde substantivering
this substantiveringdeze substantivering
that substantiveringdie substantivering
our substantiveringonze substantivering
your substantiveringjouw substantivering
every substantiveringelke substantivering
which substantivering?welke substantivering?
a big substantivering / the big substantiveringeen grote substantivering, de grote substantivering

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).