The phrase "intentional action" refers to something that you do on purpose or with a specific goal in mind. It means that you are deliberately doing something, rather than doing it by accident or without thinking. Full definition
Every day, hundreds of innocent victims are severely injured by the negligent, careless or intentional actions of others. (chicagolegalgroup.com)
Like anything else involving communicating with another human being, it's the words we choose, backed with intentional action, that will build bridges and increase trust. (inc.com)
Maybe we should not ignore the role of intentional action in the state of things. (firstthings.com)