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Jyutping fong4 bat1 sing1 fong4
Pinyin fáng bù shèng fáng

Definitions (CC-CEDICT)
  1. you can't guard against it (idiom)
  2. impossible to defend effectively
  3. not much one can do about it
  4. It can't be prevented.
Definitions (粵典–words.hk)
  1. 語句
    難​以防​備​;​想​擋​都​擋​唔​住
    impossible to guard against, often due to the opponent's fast changing tactics
    • 美國研製咗最新型嘅導彈,令中國防不勝防。
      美国研制咗最新型嘅导弹,令中国防不胜防。
      USA's invention of the latest missile is impossible for China to guard against.
Definitions (Wiktionary)
  1. phrase, idiomatic
    the utmost care could not prevent it from happening; to be impossible to defend effectively
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    美国研制咗最新型嘅导弹,令中国防不胜防。
    美國研製咗最新型嘅導彈,令中國防不勝防。
    • USA's invention of the latest missile is impossible for China to guard against.