定心丸

dìngxīnwán
  1. tranquilizer
  2. sth that sets one's mind at ease

CEDICT

Entry Composition

1 定 dìng
  1. to fix; to set; to make definite
  2. to subscribe to (a newspaper etc); to book (tickets etc); to order (goods etc)
  3. to congeal; to coagulate
  4. (literary) definitely
2 心 xīn
  1. heart
  2. mind
  3. intention
  4. center
  5. core

classifiers: 顆, 個
3 丸 wán
  1. ball
  2. pellet
  3. pill