De or het expertsie?

The correct Dutch article is:

de expertsie

Rule Words ending in -tie and -sie: almost always de. See the rule

This word is not in the word lists we use to double-check answers.

How to use expertsie

the expertsiede expertsie
this expertsiedeze expertsie
that expertsiedie expertsie
our expertsieonze expertsie
your expertsiejouw expertsie
every expertsieelke expertsie
which expertsie?welke expertsie?
a big expertsie / the big expertsieeen grote expertsie, de grote expertsie