This is the 4607th most frequent Polish word.
metro
"Metro" in Polish refers to an underground rapid transit system, similar to a subway.
In this sentence, 'metro' is used as a noun referring to an underground rapid transit system.
Metro w Warszawie jest nowoczesne i wygodne.
The metro in Warsaw is modern and comfortable.
Here, 'metro' again denotes an underground transit system but is discussed in the context of other cities, indicating its widespread presence.
Wiele miast europejskich ma rozwinięte metro.
Many European cities have developed metro systems.
In this case, 'metro' refers to the vehicle or train within the metro system, emphasizing its usability in transportation.