reinKK [ˈren] ｜ /ˈreɪn/
GEPT 中高級
C2noun
One of a pair of long straps used to control a horse and that are usually connected to the bit or the headpiece.
As the horse galloped out of control, the rider pulled the reins tightly to slow the animal down.
（馬）韁繩
C2noun
Any means of control or restraint.
The new supervisor implemented tighter deadlines and stricter guidelines to keep the team on a tight rein.
控制手段；約束
C2verb
Control and direct with or as if by reins.
She knew how to rein her emotions and remain calm during stressful situations.
C2verb
Stop or check by pulling on the reins.
She had to rein in her horse before it ran too fast.
C2verb
Keep something or someone in check.
The teacher used a firm hand to rein in the rowdy students.
C2verb
Gradually slow down or stop a horse or oneself by pulling on the reins.
The experienced rider was able to rein in the spirited stallion before it bolted off.