to do, make, or accomplish: to bring something about by deliberate action
This is a poetic word for acting, found mostly in Job, the Psalms, Proverbs, and the prophets, where it sits alongside the everyday word for doing and making. To pa'al something is to carry it out and bring it into being, with the focus on the deed itself and on who is responsible for it.
The word leans heavily on the moral weight of an action. It describes what God does, often his saving and ordering acts, and it describes what people do, very often their wrongdoing. Its single most common form is a set phrase, "those who do iniquity," a standing label for the wicked as people whose whole way of life is producing evil.
So the senses below are not different definitions of the word but the same act of doing seen from different angles: God at work, people producing evil, and human action in general, including doing what is right. The English word stays the same throughout; what changes is the actor and the moral color of the deed.