This is the 123rd most frequent Estonian word.
maailma
The Estonian word "maailma" means "world" in English.
In this sentence, 'maailma' serves as a modifier, in the genitive case, to 'ajaloost' (history), specifying the subject of the history.
Ta kirjutas raamatu maailma ajaloost.
He/she wrote a book about the history of the world.
Here, 'maailma' is in the genitive case, modifying 'probleemid' (problems) to mean 'the problems of the world'.
Maailma probleemid vajavad ühist lahendust.
The world's problems require a collective solution.
In this sentence, 'maailma' is used to represent 'the world' as a general concept encompassing our entire planet.