翅膀硬

1. • to fledge

     of a bird

2. • (of a person) to outgrow the need to be submissive to one's parents, mentor etc to break away from the people who have supported one up to now

     fig.

Character by character

• 翅(chì)wing
• 膀(bǎng)upper arm
• 硬(yìng)hard