滑らかさ

(1)the quality of being free from errors or interruptions; "the five-speed manual gearbox is smoothness personified"

(2)誤りがない、邪魔が入らない状態

(3)a texture without roughness; smooth to the touch; "admiring the slim smoothness of her thighs"; "some artists prefer the smoothness of a board"

(4)ざらざらしていない手触り

(5)感触が滑らかな

(1)