De or het gifvrij?

The correct Dutch article is:

de gifvrij

Rule Words ending in -ij and -erij: usually de. See the rule

How to use gifvrij

the gifvrijde gifvrij
this gifvrijdeze gifvrij
that gifvrijdie gifvrij
our gifvrijonze gifvrij
your gifvrijjouw gifvrij
every gifvrijelke gifvrij
which gifvrij?welke gifvrij?
a big gifvrij / the big gifvrijeen grote gifvrij, de grote gifvrij