千里之堤，潰於蟻穴 [－－－－－溃于蚁－]

Jyutping cin1 lei5 zi1 tai4 ， kui2 jyu1 ngai5 jyut6
Pinyin qiān lǐ zhī dī ， kuì yú yǐ xué

Definitions (Wiktionary)
  1. proverb
    a small mistake can lead to a massive disaster

千里之堤，潰於蟻穴 [－－－－－溃于蚁－]

Jyutping cin1 lei5 zi1 tai4 , kui2 jyu1 ngai5 jyut6
Pinyin qiān lǐ zhī dī , kuì yú yǐ xué

Definitions (CC-CEDICT)
  1. lit. an ant hole may cause the collapse of a great dike (idiom)
  2. fig. huge damage may result from a moment's negligence