De or het gassie?

The correct Dutch article is:

het gassie

Exception Words ending in -tie and -sie usually take de, but gassie is an exception. See the rule
Meaning (Dutch) (Jiddisch-Hebreeuws, kleding) muts, pet

How to use gassie

the gassiehet gassie
this gassiedit gassie
that gassiedat gassie
our gassieons gassie
your gassiejouw gassie
every gassieelk gassie
which gassie?welk gassie?
a big gassie / the big gassieeen groot gassie, het grote gassie

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