This is the 5421st most frequent Polish word.
sycylijskiej
"Sycylijskiej" means "Sicilian" (relating to Sicily).
The word 'sycylijskiej' is used here as an adjective in the genitive singular feminine form, describing 'wyspie' (island).
Odwiedziliśmy winiarnię na sycylijskiej wyspie.
We visited a winery on the Sicilian island.
In this sentence, 'sycylijskiej' describes 'oliwy' (olive oil), which is of feminine gender in singular form.
Podoba mi się smak sycylijskiej oliwy.
I like the taste of Sicilian olive oil.
Here, 'sycylijskiej' is used as an adjective in the genitive singular feminine form to describe 'ceramiki' (ceramics).