5. Velocity
A quickness or speed of motion, action, or operation; rapidity or swiftness: speed or the rapidity of movement; speed imparted to something; a measure of the rate of motion of a body expressed as the rate of change of its position in a particular direction with time. 
It is measured in metres per second, miles per hour, etc: the derivative of position with respect to time; a rate of occurrence or action, the rate of speed with which something happens; rapidity of action or reaction; the rate of turnover (Middle French velocité, from Latin velocitat-, velocitas, from veloc-, velox quick or swift; probably akin to Latin vegēre to enliven – more at wake; related to volāre to fly. See velocipede, -ty: First Known Use: 15th century).
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accepted standards or practice; the quality of being perverted or perverse, meaning wrong or different in a way that is strange or offensive, turned away from what is right or good, contrary to the evidence (Middle English, from Anglo-French purvers, pervers, from Latin perversus, from past participle of pervertere, First Known Use: 14th century). In cities, imperviousity most commonly refers to impervious materials in constructing the built environment (such as roads, walls, etc.) or the obscuring, inversion or privatization of components of the built environment necessarily associated for human activity (such as doors, windows, and porches).
not continuously filled, used, or lived in on a everyday basis for activity, as distinguishable from the storage of things; not occupied, being without content, free from activity; devoid of thought, reflection, or expression; a state of absence; not put to use; also the opposite of full: Middle English, from Anglo-French, from Latin vacant-, vacans, present participle of vacare (to be empty); First Known Use: 14th century.
meaning extending a great distance from one side to the other; not narrow as measured from side to side; having a specified width; and opened as far as possible over a great or specified distance, area or extent; so as to leave as much space or distance between to the fullest extent.
sustainable cities; of few and scattered elements; especially: not thickly grown or settled, lacking fullness or completeness. Derivative of Latin sparsus meaning spread out, from past participle of spargere to scatter.