樹窿 [树－]

Jyutping syu6 lung4
Pinyin shù lóng

Definitions (Wiktionary)
  1. noun, Cantonese
    tree hollow (Classifier: 個／个)
  2. noun, Cantonese, figuratively
    someone who listens to one's problems and keeps them secret; confidant (Classifier: 個／个)

樹窿 [树－]

Jyutping syu6 lung1
Pinyin shù lóng

Definitions (粵典–words.hk)
  1. 名詞
    樹木​上面​出​現​嘅​窿​（​量​詞​：​個​）
    tree hole
  2. 名詞
    比喻​為​聆​聽​其他人​心事​而​保密​嘅​人​（​量​詞​：​個​）
    figuratively, person who listens to someone's worries and keeps them secret
    • 我唔介意做你嘅樹窿。
      我唔介意做你嘅树窿。
      ngo5 m4 gaai3 ji3 zou6 nei5 ge3 syu6 lung1.
      I don't mind being your secret keeper.
Definitions (Kaifangcidian)
  1. 樹洞 – 树洞
Examples (粵典–words.hk)
  1. Cantonese
    我唔介意做你嘅树窿。
    我唔介意做你嘅樹窿。
    ngo5 m4 gaai3 ji3 zou6 nei5 ge3 syu6 lung1.
    • I don't mind being your secret keeper.