From Middle English smethnes, *smothnes, from Old English smēþnes, *smōþnes (“smoothness, a smooth place, a level surface”), equivalent to smooth + -ness.
Smoothness Sentence Examples
He moved silently and with smoothness and purpose.
In this way smoothness of working is ensured, the cog-wheel being constantly in action with the rack.
There is, it is true, a smoothness and finish about them not often seen elsewhere; but, as though to avoid the exaggerations of Audubon, Gould usually adopted the tamest of attitudes in which to represent his subjects, whereby expression as well as vivacity is wanting.
Yet he could not have been insensible to the immense superiority in rhythmical smoothness which the hexameter of Lucretius has over that of Ennius and Lucilius.