咬人的狗不露齿

1. • lit. the dog that bites doesn't show its teeth (idiom)
2. • fig. the most sinister of people can look quite harmless

Character by character

• 咬(yǎo)bite
• 人(rén)person
• 的(de)marks possession and modification
• 狗(gǒu)dog
• 不(bù)no
• 露(lòu)show
• 齿(chǐ)tooth