dynamic
adjective
°Changeable; active; in motion usually as the result of an external force.
"The environment is dynamic, changing with the years and the seasons."
°Powerful.
noun
°A characteristic or manner of an interaction; a behavior.
°(music) The varying loudness or volume of a song or the markings that indicate the loudness.
synonyms: active, fluid, moving, energetic more» , powerful, apparatus, course of action, design, effect, function, functioning, implementation, interchange, interplay, mechanism, method, modus operandi, motif, nature, operation, pattern, process, regimen, workings