De or het gradatie?

The correct Dutch article is:

de gradatie

  • Plural: de gradaties
Rule Words ending in -tie and -sie: almost always de. See the rule
Meaning (Dutch) trap, niveau

How to use gradatie

the gradatiede gradatie
this gradatiedeze gradatie
that gradatiedie gradatie
our gradatieonze gradatie
your gradatiejouw gradatie
every gradatieelke gradatie
which gradatie?welke gradatie?
a big gradatie / the big gradatieeen grote gradatie, de grote gradatie
the gradatie (plural)de gradaties, deze gradaties

Dutch words ending in gradatie

degradatie | bodemdegradatie | biodegradatie | landdegradatie | papiergradatie

In compound words, the last part decides the article. See the rule

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