This is the 338th most frequent Swedish word.
världens
"Världens" means "the world's" in English.
The word 'världens' is used to emphasize an absolute quality of the person being extremely kind.
Han är världens snällaste person.
He is the kindest person in the world.
Here, 'världens' is employed to convey the superlative nature of the city being the most beautiful.
Vi bor i världens vackraste stad.
We live in the most beautiful city in the world.
In this sentence, 'världens' refers possessively to all corners of the world, indicating a global scope.