De or het kookhitte?

The correct Dutch article is:

de kookhitte

Rule Words ending in -te: usually de. See the rule

How to use kookhitte

the kookhittede kookhitte
this kookhittedeze kookhitte
that kookhittedie kookhitte
our kookhitteonze kookhitte
your kookhittejouw kookhitte
every kookhitteelke kookhitte
which kookhitte?welke kookhitte?
a big kookhitte / the big kookhitteeen grote kookhitte, de grote kookhitte