smoothness
n. B2 Upper Intermediate US //ˈsmuðnəs// UK //smˈuːðnəs// smooth·ness
n. the quality of being flat, even, and free of any rough or bumpy parts. You use this to describe things like a surface, a voice, or a ride.
n. the quality of being free from irregularities, bumps, or roughness. Often used to describe physical surfaces, vocal tones, or the flow of a process.
The smoothness of the marble floor makes it easy to clean.
The pilot praised the smoothness of the flight, noting that there were no sudden bumps or turbulence.
The artisan's skill is evident in the smoothness of the pottery, which feels perfectly even to the touch despite the complex patterns etched into the surface.
From Middle English smothenesse; equivalent to smooth + -ness. Compare Old English smēþnes (“smoothness, a smooth place, a level surface”).