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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.
"Watch the dynamic between the husband and wife when they disagree."
°(music) The varying loudness or volume of a song or the markings that indicate the loudness.
"If you pay attention to the dynamics as you play, it's a very moving piece."
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