This is the 199th most frequent Ukrainian word.
війна
War.
The word 'війна' is used in its primary meaning as 'war', referring to a conflict or battle.
Війна завжди приносить страждання людям.
War always brings suffering to people.
Here, 'війни' signifies the genitive case of 'війна', used to describe the period of conflict that has ended.
Після довгих років війни настала мирна година.
After long years of war, a peaceful hour came.
In this sentence, 'війни' is in its genitive singular form, signifying the subject of the story.