This is the 15076th most frequent Polish word.
rukoli
"Rukoli" is the genitive or dative form of "rukola," which means "arugula" or "rocket" (a type of leafy green).
Here, 'rukoli' is in the genitive singular case, indicating possession or quantity.
W mojej sałatce jest dużo rukoli.
There is a lot of arugula in my salad.
In this sentence, 'rukoli' is also in the genitive singular, describing the taste associated with it.
Uwielbiam smak rukoli.
I love the taste of arugula.
'Rukoli' appears in the genitive singular case, usually required after words expressing a partitive meaning, like 'trochę' (some).