also: すべらか
na-adjective
Describes a surface that is physically smooth, without roughness or bumps. Often used for skin, paper, fabric, or polished materials.
この机の表面はとても滑らかだ。
The surface of this desk is very smooth.
赤ちゃんの肌は滑らかで柔
A baby's skin is smooth and soft.
na-adjective
smooth; fluent; fluid; trouble-free
Describes actions, processes, or speech that proceed without interruption, difficulty, or awkwardness. Common for meetings, negotiations, movements, and language fluency.
会議は滑らかに進んだ。
The meeting proceeded smoothly.
彼女は滑らかな英語を話す。
She speaks fluent English.
na-adjective
continuously differentiable
Mathematics term for a function that is differentiable and whose derivative is continuous. Rare outside technical contexts.
この関数は区間全体で滑らかである。
This function is continuously differentiable over the entire interval.