This is the 434th most frequent Finnish word.
sotaa
"Sotaa" is the partitive singular form of "sota," meaning "war."
In this sentence, 'sotaa' is in the partitive case and is used as a noun meaning 'war', indicating an indefinite object of desire.
Hän ei halua sotaa.
He does not want war.
Here, 'sotaa' is in the third-person singular form of the verb 'sotaa', meaning 'to fight or to war', used as the predicate verb.
He sotaa huvikseen.
They engage in mock fights for fun.
In this context, 'sota' is in the nominative case used as a noun to refer to 'war', showing a general statement.