This is the 17939th most frequent Polish word.
środowy
"Środowy" means "Wednesday-related" or "of Wednesday."
"Środowy" in this context refers to "mecz" (match) scheduled for Wednesday, emphasizing the day it happens on.
Jutro odbędzie się środowy mecz na stadionie.
Tomorrow, the Wednesday match will take place at the stadium.
The word "środowych" is a declension of "środowy," used here as an adjective modifying "zajęć," indicating activities related to Wednesday.
Ten film był częścią środowych zajęć w szkole.
This movie was part of Wednesday's lessons at school.
Here, "środowy" is used as an adjective describing "obiad," specifying that the lunch occurs on Wednesday.