石灰

shíhuī
lime (calcium oxide)

CEDICT

Entry Composition

1 石 shí
  1. rock
  2. stone
  3. stone inscription
  4. one of the eight categories of ancient musical instruments 八音 bāyīn
2 灰 huī
  1. ash
  2. dust
  3. lime
  4. gray
  5. discouraged; dejected