打招呼

dǎzhāohu
  1. to greet sb by word or action
  2. to give prior notice

CEDICT

Entry Composition

1 打 dǎ
  1. a semantically light, transitive verb that is combined with various grammatical objects to form compound verbs and verb-object phrases with a diverse range of meanings (e.g. 打傘 dǎsǎn "to hold an umbrella", 打電話 dǎdiànhuà "to make a phone call", 打針 dǎzhēn "to get an injection", 打手套 dǎshǒutào "to knit gloves", 打氣 dǎqì "to inflate")
  2. to hit; to strike
  3. to fight
  4. (coll.) from; since (as in 打那以後 dǎnàyǐhòu "since then")
2 招呼 zhāohu
  1. to call out to
  2. to greet
  3. to say hello to
  4. to inform
  5. to take care of
  6. to take care that one does not