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Jyutping lou6 dai2
Pinyin lòu dǐ

Definitions (CC-CEDICT)
  1. to let out a secret
Definitions (粵典–words.hk)
  1. 動詞
    露出​內褲
    to reveal one's lower undergarments
    • 你條裙咁短,你唔怕露底呀?
      你条裙咁短,你唔怕露底呀?
      You skirt is so short, don't you afraid of revealing the underwear ?
  2. 動詞
    底​藴​、​底細​被​揭穿
    the hidden agenda or hidden identity is revealed
    • 呢個卧底真係無鬼用,一凶佢就露晒底。
      呢个卧底真系无鬼用,一凶佢就露晒底。
      This undercover is so bloody useless, just a bit of intimidates can make him revealed all his true identity.
  3. 動詞
    底子​、​基礎​不足​嘅​情​況​被​清楚​顯示
    the weak foundation is revealed
    • 呢啲基建質素認真差,打個風就露底嘞。
      呢啲基建质素认真差,打个风就露底嘞。
      The quality of those infrastructures are really bad, just a typhoon then the weak foundation is revealed.
Definitions (Wiktionary)
  1. verb
    to let out a secret
  2. verb, informal
    to expose (暴露) one's underwear (底褲/底裤)
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    佢踎低𠮶阵时露底 啊。
    佢踎低嗰陣時露底 啊。
    keoi5 mau1 dai1 go2 zan6 si2 lou6 dai2 aa3.
    • He accidentally revealed his underpants when he squatted.
  2. Cantonese
    你条裙咁短,你唔怕露底呀?
    你條裙咁短,你唔怕露底呀?
    • You skirt is so short, don't you afraid of revealing the underwear ?
  3. Cantonese
    呢啲基建质素认真差,打个风就露底嘞。
    呢啲基建質素認真差,打個風就露底嘞。
    • The quality of those infrastructures are really bad, just a typhoon then the weak foundation is revealed.
Examples (Wiktionary)
  1. Cantonese
    露底
    露底
    lou6 dai2
    • to expose one's underpants