ㄧㄤˇyǎngㄩㄥyōngˊㄏㄨㄢˋhuàn

  1. 比喻姑息養奸後患參見養癰成患二十年目睹之怪現狀·第一》:利用未嘗不可他們力量大事要是不能利用這個養癰貽患也是不免。」斬草除根

lit. to foster an ulcer and bequeath a calamity (idiom)​; tolerating budding evil can only lead to disaster, to cherish a viper in one's bosom