Last Updated：2025/11/21

To stop or slow a horse by pulling the reins / (idiomatic) To stop or slow something, by exercising control.

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rein in

Source Word

rein in

Verb

idiomatic

Japanese Meaning

馬を手綱で制御しながら動きを止める、または速度を落とす行為 / 比喩的に、事や人の進展を制御または抑制する

He had to rein in his horse when it spooked at the passing carriage.

馬車に驚いた馬の速度を落とそうと、彼は手綱を引かなければならなかった。

Sense（1）

To stop or slow a horse by pulling the reins

Sense（2）

(idiomatic) To stop or slow something, by exercising control.

The government has no other option than to rein in public spending.

reins in

（ present singular third-person ）

reining in

（ participle present ）

reined in

（ participle past ）

reined in

（ past ）