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Jyutping on1 bou2
Pinyin ān bǎo

Definitions (CC-CEDICT)
  1. to maintain security (abbr.)
Definitions (Wiktionary)
  1. noun, attributive, often
    security (procedures followed to ensure the security of a state, organization, etc.)
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)
  1. 職業:臺
    保全員、保全、警衛
  2. 職業:陸
    保安人員、保安、安保