This is the 6055th most frequent Spanish word.
adelaide
"Adelaide" is not a Spanish word; it is a proper noun, typically a name or the name of a city in Australia.
Here, 'Adelaide' again refers to the city in Australia, emphasizing its historical aspect.
Estoy leyendo un libro sobre la fundación de Adelaide.
I am reading a book about the founding of Adelaide.
Here 'Adelaide' is used as the name of a place, specifically a city in Australia.
Adelaide es una ciudad muy bonita en Australia.
Adelaide is a very beautiful city in Australia.
In this instance, 'Adelaide' is used as a personal name.