This is the 13260th most frequent Polish word.
opony
"Tires" or "tyres."
Here, 'opony' refers directly to tires as a noun in the context of car equipment.
Samochód ma nowe opony.
The car has new tires.
In this sentence, 'opony' is used in the locative plural form ('w oponach') to indicate discussing the tires in relation to their air pressure.
Musimy sprawdzić ciśnienie w oponach.
We need to check the pressure in the tires.
'Opony' is used in the genitive plural form ('stan opon') referring to an attribute of the tires, their condition.