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Jyutping zi3 gaau1
Pinyin zhì jiāo

Definitions (CC-CEDICT)
  1. best friend
Definitions (Wiktionary)
  1. noun
    most intimate friend; best friend
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    你有多少至交?
    你有多少至交?
    nǐ yǒu duō shǎo zhì jiāo ?
    • How many close friends do you have?