De or het summum?

The correct Dutch article is:

het summum

  • Plural: de summums
Rule Words ending in -um and -ium: usually het. See the rule
Meaning (Dutch) hoogtepunt, toppunt

How to use summum

the summumhet summum
this summumdit summum
that summumdat summum
our summumons summum
your summumjouw summum
every summumelk summum
which summum?welk summum?
a big summum / the big summumeen groot summum, het grote summum
the summum (plural)de summums, deze summums

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