This is the 178th most frequent Polish word.
sezonie
"Sezonie" means "season" (locative case) in English.
Here, 'sezonie' is in the locative case, specifying the time frame during which the action takes place.
W tym sezonie będziemy oglądali wiele ciekawych seriali.
This season, we will watch many interesting series.
'Sezonie' is used here in the context of a sports event time frame, again in the locative case indicating the period being referred to.
Wiosną rozpoczyna się piłkarski sezon, a w tym sezonie gramy lepiej.
In spring, the football season begins, and this season we are playing better.
In this sentence, 'sezonie' represents any time period, and it is employed in the locative case to specify when the event occurred.