滑なめらか

na-adjective

smooth; glassy; velvety; soft

Describes a surface that is physically smooth, without roughness or bumps. Often used for skin, paper, fabric, or polished materials.

• この机つくえの表ひょう面めんはとても滑なめらかだ。

  The surface of this desk is very smooth.

• 赤あかちゃんの肌はだは滑なめらかで柔やわらかい。

  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.

• 会かい議ぎは滑なめらかに進すすんだ。

  The meeting proceeded smoothly.

• 彼かの女じょは滑なめらかな英えい語ごを話はなす。

  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.

• この関かん数すうは区く間かん全ぜん体たいで滑なめらかである。

  This function is continuously differentiable over the entire interval.