De or het somberen?

The correct Dutch article is:

het somberen

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

How to use somberen

the somberenhet somberen
this somberendit somberen
that somberendat somberen
our somberenons somberen
your somberenjouw somberen
every somberenelk somberen
which somberen?welk somberen?
a big somberen / the big sombereneen groot somberen, het grote somberen