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Jyutping sau2 mong6 soeng1 zo6
Pinyin shǒu wàng xiāng zhù

Definitions (CC-CEDICT)
  1. to keep watch and defend one another (idiom, from Mencius); to join forces to defend against external aggressors
  2. mutual help and protection
Definitions (粵典–words.hk)
  1. 動詞
    鄰里​互相​幫助
    (usually of neighbours) to help one another
    • 隔籬鄰舍應該守望相助嘅。
      隔篱邻舍应该守望相助嘅。
      gaak3 lei4 leon4 se5 jing1 goi1 sau2 mong6 soeng1 zo6 ge3.
      Neighbours should help one another out, shouldn't they.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to keep watch and defend and help one another
Examples (粵典–words.hk)
  1. Cantonese
    隔篱邻舍应该守望相助嘅。
    隔籬鄰舍應該守望相助嘅。
    gaak3 lei4 leon4 se5 jing1 goi1 sau2 mong6 soeng1 zo6 ge3.
    • Neighbours should help one another out, shouldn't they.
  2. Cantonese
    守望相助
    守望相助
    sau2 mong6 soeng1 zo6
    • to keep watch together in mutual defence
  3. Cantonese
    佢哋情同手足,守望相助。
    佢哋情同手足,守望相助。
    keoi5 dei6 cing4 tung4 sau2 zuk1, sau2 mong6 soeng1 zo6.
    • They are like siblings, helping each other.