This is the 907th most frequent Finnish word.
päätöstä
"Päätöstä" is the partitive singular form of "päätös," meaning "decision" in English.
In this sentence, 'päätöstä' is used in its partitive form to indicate an ongoing action of considering a decision.
Olen harkinnut tätä päätöstä jo pitkään.
I have considered this decision for a long time.
Here, 'päätöstä' appears in the partitive case to reflect the negative construction of the verb phrase 'do not make a decision'.
Me emme tee päätöstä kiireessä.
We do not make a decision in a hurry.
The term 'päätöstä' in this case is also in the partitive form, associated with the cognitive action of evaluating the decision as correct.