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Jyutping ngam3 aa2 dai2
Pinyin àn yǎ dǐ

Definitions (Wiktionary)
  1. adv
    covertly

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Jyutping am3 aa2 dai2
Pinyin àn yǎ dǐ

Definitions (CC-CANTO)
  1. secretly; silently; underhand [colloquial]
Definitions (粵典–words.hk)
  1. 副詞
    暗地​裏​;​不為​人知​;​私下​;​偷偷地
    underhand; secretly
    • 佢睇落好好人,但佢其實暗啞底成日講人壞話。
      佢睇落好好人,但佢其实暗哑底成日讲人坏话。
      keoi5 tai2 lok6 hou2 hou2 jan4, daan6 keoi5 kei4 sat6 am3 aa2 dai2 seng4 jat6 gong2 jan4 waai6 waa2.
      He seems like a nice person, but he actually always secretly talk bad about the others.
  2. 副詞
    默默​;​形容​人​付出​、​受苦​嘅​時​候​唔​出​聲​唔​張​揚
    without taking credit; without complaint (of someone who puts in effort or suffers)
    • 個女仔暗啞底為大家做咗好多嘢。
      个女仔暗哑底为大家做咗好多嘢。
      go3 neoi5 zai2 am3 aa2 dai2 wai6 daai6 gaa1 zou6 zo2 hou2 do1 je5.
      The girl has done a lot for everyone without taking credit.
  3. 參看
    暗啞抵
Examples (粵典–words.hk)
  1. Cantonese
    佢睇落好好人,但佢其实暗哑底成日讲人坏话。
    佢睇落好好人,但佢其實暗啞底成日講人壞話。
    keoi5 tai2 lok6 hou2 hou2 jan4, daan6 keoi5 kei4 sat6 am3 aa2 dai2 seng4 jat6 gong2 jan4 waai6 waa2.
    • He seems like a nice person, but he actually always secretly talk bad about the others.
  2. Cantonese
    个女仔暗哑底为大家做咗好多嘢。
    個女仔暗啞底為大家做咗好多嘢。
    go3 neoi5 zai2 am3 aa2 dai2 wai6 daai6 gaa1 zou6 zo2 hou2 do1 je5.
    • The girl has done a lot for everyone without taking credit.