名詞 rein:

1. one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse
2. any means of control

動詞 rein:

1. control and direct with or as if by reins
   同義詞：harness, rein in, draw rein
2. stop or slow up one's horse or oneself by or as if by pulling the reins
   同義詞：rein in
3. stop or check by or as if by a pull at the reins
   同義詞：rein in
4. keep in check
   同義詞：rule, harness

1. The horse answers to the slightest pull on the rein.
   韁繩輕輕一動，這匹馬就有反應。
2. The horse responds to the slightest pull on the rein.
   只要韁繩稍稍一拉，這匹馬就有反應。
3. He pulled at the reins.
   他使勁拉住韁繩。
4. This horse reins well.
   這匹馬易于駕馭。

rein

n.（名詞）
Often reins A long, narrow leather strap attached to each end of the bit of a bridle and used by a rider or driver to control a horse or other animal.
常作 reins 韁繩：附在馬勒的馬嚼子兩端的長而細的皮繩，騎者或者車夫用來控制馬匹或其他動物
A means of restraint, check, or guidance.
牽制，指引：限制、檢查或者指導的方式
Often reins A means or an instrument by which power is exercised:
常作 reins 控制的手段，統(tǒng)御：行使權力的方式或器具：
例句：
the reins of government.
政府的執(zhí)政權

v.（動詞）
reined,rein.ing,reins
v.tr.（及物動詞）
To check or hold back by or as if by the use of reins. Often within, back, or up.
以韁繩勒制：通過或好象通過使用韁繩勒住。常和in、back 或者 up 連用
To restrain or control.
箍制或控制
v.intr.（不及物動詞）
To control a horse, for example, with reins.
駕馭：控制馬匹，例如用韁繩

<習慣用語>draw in the reins
To slow down or stop by or as if by pressure on the reins.
收韁勒馬：用有好象用韁繩使放慢速度或停住
give free rein to 或
give full rein to
To release from restraints; allow to go unchecked:
放任：放松約束；讓無拘束地走：
例句：
gave rein to her emotions.
放任她的感情

tight rein
Close control:
嚴密的控制：
例句：
kept expenses on a tight rein.
嚴格的控制花銷

來源：
Middle English
中古英語
from Old French resne, reine
源自 古法語 resne, reine
from Vulgar Latin *retina
源自 俗拉丁語 *retina
from Latin retinôre [to retain] * see retain
源自 拉丁語 retinôre [約束] *參見 retain