De or het handmatigheid?

The correct Dutch article is:

de handmatigheid

Rule Words ending in -heid: almost always de. See the rule

How to use handmatigheid

the handmatigheidde handmatigheid
this handmatigheiddeze handmatigheid
that handmatigheiddie handmatigheid
our handmatigheidonze handmatigheid
your handmatigheidjouw handmatigheid
every handmatigheidelke handmatigheid
which handmatigheid?welke handmatigheid?
a big handmatigheid / the big handmatigheideen grote handmatigheid, de grote handmatigheid