kng-ku̍t光滑

smooth

smooth; glossy; sleek; smooth (having derivatives of all finite orders at all points within the function’s domain)

English Wiktionary, “光滑” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%85%89%E6%BB%91 · confidence: Medium (Wiktionary, Hokkien)