This is the 5300th most frequent Dutch word.
klaas
"Klaas" is a Dutch male given name, equivalent to "Nicholas" in English.
In this sentence, 'Klaas' is used as a proper noun, referring to a specific person by name.
Klaas fietst naar de markt.
Klaas bikes to the market.
Here, 'klaas' is used as a common noun, referring to a character archetype or role.
De dikke klaas speelt een hoofdrol in dit oude sprookje.
The big klaas plays a major role in this old fairy tale.
In this case, 'klaas' is used metaphorically to compliment someone on their skill or cleverness.