This is the 8787th most frequent German word.
kurios
Strange, odd, or unusual.
Here, 'kuriose' is used to describe stories that are unusual or intriguing, adding an element of interest.
Das Buch enthält einige kuriose Geschichten.
The book contains some curious stories.
In this context, 'kurios' conveys a sense of peculiarity or strangeness that makes the apparatus stand out.
Ich fand den alten Apparat sehr kurios.
I found the old apparatus very peculiar.
Here, 'kurios' describes a smile that is notable due to its distinctive or intriguing nature.