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Jyutping jan4 si4
Pinyin yín shí

Definitions (CC-CEDICT)
  1. 3-5 am (in the system of two-hour subdivisions used in former times)
Definitions (Wiktionary)
  1. noun, literary
    the hours of the tiger (3:00am to 5:00am)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)