口令

kǒulìng
  1. oral command
  2. a word of command (used in drilling troops or gymnasts)
  3. password (used by sentry)

CEDICT

Entry Composition

1 口 kǒu
  1. mouth
  2. classifier for things with mouths (people, domestic animals, cannons, wells etc)
  3. classifier for bites or mouthfuls
2 令 lìng
  1. to order
  2. to command
  3. an order
  4. warrant
  5. writ
  6. to cause
  7. to make sth happen
  8. virtuous
  9. honorific title
  10. season
  11. government position (old)
  12. type of short song or poem