na-adjective, taru-adjective, adverb taking the 'to' particle
stylish; smart; elegant; chic; refined; neat
Describes a person, appearance, or atmosphere that is tastefully refined and uncluttered. Often used in literary or formal descriptions. Can also function as a たる adjective or adverb with と.
彼女の瀟洒な装いに、皆が目を奪われた。
Everyone was captivated by her stylish outfit.
その店は瀟洒とした雰囲気で、大人の隠れ家のようだ。
The shop has a refined atmosphere, like a hideaway for adults.
The kanji 瀟 and 洒 both relate to water and cleansing, suggesting a washed, clean, and uncluttered appearance. The word likely entered Japanese from Chinese literary usage, where it described natural, unadorned elegance.