消瘦

xiāoshòu
  1. to waste away
  2. to become thin

CEDICT

  1. emaciated; scrawny; skinny
  2. to lose weight; to become thin

Wiktionary

消减瘦弱。

重編國語辭典

Entry Composition

1 消 xiāo
  1. to diminish; to subside
  2. to consume; to reduce
  3. to idle away (the time)
  4. (after 不 bù or 只 zhǐ or 何 hé etc) to need; to require; to take
2 瘦 shòu
  1. thin
  2. to lose weight
  3. (of clothing) tight
  4. (of meat) lean
  5. (of land) unproductive