明枪易躲，暗箭难防
míng​qiāng​yì​duǒ'àn​jiàn​nán​fáng

it is hard to guard against secret conspiracies

  1. 明枪易躲 明槍易躲 míng​qiāng​yì​duǒ
    spears in the open are easy to dodge
    easy to dodge a spear in the open; it is easy to defend against an open attack or an overt threat, as opposed to a hidden one
  2. ， àn
    non-Chinese
  3. 暗箭难防 暗箭難防 àn​jiàn​nán​fáng
    it is hard to guard against an arrow shot from the dark
    It is difficult to defend against hidden attacks or underhanded schemes. This idiom is often used alongside 明枪易躲 míng​qiāng​yì​duǒ.