This is the 4872nd most frequent Polish word.
owoców
"Owoców" means "fruits" (genitive plural form).
In this sentence, 'owoców' is in the genitive plural form, meaning 'of fruits,' used to indicate non-specific quantity or absence (e.g., none of them).
Nie zjadłem żadnych owoców wczoraj.
I didn’t eat any fruits yesterday.
Here, 'owoców' is also in the genitive plural case, used to express association or possession (e.g., the scent of fruits).
Uwielbiam zapach owoców latem.
I love the smell of fruits in the summer.
Again, 'owoców' is in the genitive plural, employed after 'więcej' to describe quantity (e.g., more of fruits).