In a game you might be able to run about, but if you can also jump it opens up a whole new axis of maneuverability. New verbs can multiply the possible actions you can take.
When I say "verbs" I am describing how you interact with any system or object
Design verbs not objects
Verbs multiply the possibility of interaction which can create a space giving the participant agency. Combo moves in video games are an example of how just a few core interactions can combine to create a large amount of possibilities.
Language of interaction
Verbs are the interactions, game mechanics, and affordances of a system. Verbs multiply the possibility of interaction