This is the 743rd most frequent Finnish word.
kustannusten
"Of the costs" or "of the expenses."
The word "kustannusten" refers to the costs associated with the project, indicating possession or relation.
Hankkeen kustannusten arviointi osoittautui haastavaksi.
The assessment of the project's costs turned out to be challenging.
Here, "kustannusten" signifies the concept of costs being the object of reduction.
Keskustelu kustannusten pienentämisestä jatkui pitkälle iltaan.
The discussion about reducing the costs continued late into the evening.
'Kustannusten' is the plural genitive form of 'kustannukset', used here to describe the costs whose increase is being discussed.