rein

/reɪn/

one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse

中文释义：缰绳

The rider pulled on the reins to stop the horse.

骑手拉紧缰绳让马停下。

He gave the horse a free rein to gallop across the field.

他放松缰绳让马在田野上奔驰。