養癰遺患

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

Character by character

• 養(yǎng)raise
• 癰(yōng)carbuncle
• 遺(yí)leave behind
• 患(huàn)suffer