also: すべらか
Describes a surface that is physically smooth, without roughness or bumps. Often used for skin, paper, fabric, or polished materials.
The surface of this desk is very smooth.
赤ちゃんの肌は滑らかで柔らかい。
A baby's skin is smooth and soft.
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.
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.
This table's surface is smooth.
A baby's skin is very smooth.
The robot's joints move smoothly.
He speaks English fluently.
The discussion proceeded smoothly.
滑らか describes a smooth, even surface or edge, the opposite of the jagged, notched ギザギザ.
Irregular okurigana usage; rarely encountered.
Archaic reading; not used in modern Japanese.