This is the 1743rd most frequent Russian word.
действиях
"Actions" or "acts."
The word 'действиях' is used in its nominative plural form as the subject of the sentence, signaling actions taken by someone.
Его действия внушают доверие.
His actions inspire trust.
Here, 'действиях' is used in the prepositional case to describe the basis for a decision.
На основании этих действий было принято решение.
The decision was made based on these actions.
In this sentence, 'действиях' (or 'действий' in the given sentence) describes hypothetical actions as an object of discussion.