This is the 367th most frequent Romanian word.
bucureşti
"Bucureşti" is the Romanian name for Bucharest, the capital city of Romania.
Here, 'Bucureşti' functions as the proper noun representing the name of the capital city of Romania.
Bucureşti este capitala României.
Bucharest is the capital of Romania.
In this sentence, 'Bucureşti' is used as a place, with the suffix '-ul' to indicate a definite article in Romanian for proper nouns.
Am vizitat Bucureşti-ul weekendul trecut.
I visited Bucharest last weekend.
Here, 'Bucureşti' specifies the city whose residents are being described.