This is the 358th most frequent Polish word.
miasto
"Miasto" means "city" or "town" in English.
Here, 'miasto' refers to a populated urban area, a city, forming part of a geographical explanation.
Warszawa to największe miasto w Polsce.
Warsaw is the largest city in Poland.
In this sentence, 'miasto' is used to describe a place of interest, specifying a city one intends to visit.
Chciałbym zwiedzić to miasto w przyszłości.
I would like to visit this city in the future.
Here, 'miasta' is in its genitive case, indicating possession or association, referring to the inhabitants related to the city.