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Jyutping bak1 dik6
Pinyin běi dí

Definitions (Wiktionary)
  1. name, historical
    “Northern Barbarians” (non-Chinese ethnic groups living to China's north)
    (syn.) 胡虏, 胡虜
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)