This is the 1591st most frequent Polish word.
jesieni
"Jesieni" means "autumn" or "fall" in the genitive or locative case in Polish.
The word 'jesieni' is used to denote 'autumn' or 'fall' in the genitive case, as it is after the preposition 'w czasie' (during).
W czasie jesieni kolory liści zmieniają się na czerwone i złote.
In autumn, the colors of the leaves change to red and gold.
The word 'jesieni' is again in the genitive case, now used with the preposition 'podczas' (during).
Podczas jesieni często panuje deszczowa pogoda.
During autumn, rainy weather is common.
Here 'jesieni' appears in the locative case following the preposition 'w' (in), specifying the time or season during which the action occurs.