This is the 90th most frequent Hungarian word.
háború
War.
The word "háború" is used here in its general sense to refer to the concept of war, emphasizing its emotional and societal impact.
A háború kegyetlen és fájdalmas esemény.
War is a cruel and painful event.
In this sentence, "háború" refers specifically to instances or occurrences of wars in a historical context.
A történelem során sok háború zajlott le különböző országok között.
Many wars have occurred between different countries throughout history.
Here, "háborúkról" is the plural form of "háború" (with a postposition for 'about'), used to indicate books with a theme or topic related to wars.