Definitions

1. 1. sign of trouble
2. 2. the smallest change
3. 3. at the first hint of (wind-blow grass-move)
4. 4. at the slightest disturbance

Components

• 风 fēng – wind
• 吹 chuī – to blow
• 草 cǎo – grass
• 动 dòng – (of sth) to move