Dynamics
Not sure if such a word is still in play, but as a child I remember hearing it quite regularly; there was the aerospace company General Dynamics (okay, it's still around and still rather big; but back in the heyday it was truly one of the major players), and audio speakers that boasted of "dynamic" sound. Of course, these days the word has fallen into pretty much a single category, that of family dynamics. Look up the definition of the singular term and you arrive at this (from the Oxford version ): (of a process or system) characterized by constant change, activity, or progress... forces producing motion... expressing an action, activity, event, or process. But add one letter and make the word plural and you emerge with this: T he branch of any science in which forces or changes are considered... forces or properties which stimulate growth, development, or change within a system or process. Family dynamics. Here's how Psychology Today put it: Can't we al