C2 noun /ˈpɪnjən/
pinion
一个小齿轮或鸟翅膀的外部部分;限制或使之不能动弹
Meaning
a small gear or the outer part of a bird's wing; to restrain or immobilize
Example
The bird's pinion was injured, preventing it from flying.
鸟的翅膀受伤,无法飞行。