This is the 782nd most frequent Korean word.
도시
"도시" means "city" in English.
In this sentence, '도시' (city) refers to a populated urban area where the speaker resides.
나는 큰 도시에서 살고 있어요.
I live in a big city.
Here, '도시' (city) highlights a specific location which is emphasized on its cultural and historical abundance.
그 도시는 문화와 역사가 풍부합니다.
That city is rich in culture and history.
In this sentence, '도시들' (cities) is the pluralized form of '도시', used to refer to multiple urban areas for purposes of travel.