De or het tuf?

The correct Dutch article is:

het tuf

Meaning (Dutch) versteende vulkanische as

How to use tuf

the tufhet tuf
this tufdit tuf
that tufdat tuf
our tufons tuf
your tufjouw tuf
every tufelk tuf
which tuf?welk tuf?
a big tuf / the big tufeen groot tuf, het grote tuf

Dutch words ending in tuf

tuftuf | stuf

In compound words, the last part decides the article. See the rule

Dutch words starting with tuf

tufkrijt | tufsteen | tufsterretje | tuftuf

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).