素雅

sùyǎ
simple yet elegant

CEDICT

simple but elegant; plain and in good taste

Wiktionary

素淨高雅。

重編國語辭典

Entry Composition

1 素 sù
  1. raw silk
  2. white
  3. plain, unadorned
  4. vegetarian (food)
  5. essence
  6. nature
  7. element
  8. constituent
  9. usually
  10. always
  11. ever
2 雅 yǎ elegant