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De or het decennium?

het decennium

a decade, a period of ten years

/ˌdeːˈsɛ.ni.ʏm/

Article and plural

Singular
het decennium
Plural (meervoud)
de decennia
Diminutive
het decenniumpje

Why het?

  • Nouns ending in -isme, -ment, -um and -sel usually take het.
  • Every plural takes de, so it is de decennia whatever the singular takes.
  • Every diminutive takes het: het decenniumpje.

The rules for de and het, with the exceptions

Check the article of another noun

What het changes

SingularPlural
this, thesedit decenniumdeze decennia
that, thosedat decenniumdie decennia
which (the … that)het decennium dat …de decennia die …
ourons decenniumonze decennia

Meaning in English

  1. a decade, a period of ten years

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