Based on my knowledge, there isn't a common 5-letter word in Dutch that directly translates to "tweevoud" (dual).
However, the search results suggested "Dualis" (with a capital D) as a possible answer. This is a grammatical term for the dual number, which exists in some languages but not Dutch.
Here are some other options depending on the context of the puzzle:
- Beide (both) - This implies two things.
- Twee (two) - While not technically the grammatical dual, it expresses the concept of two.
If none of these solutions fit, it's possible there might be a more obscure or creative answer specific to the puzzle you're working on.