rein
UK: reɪn | US: reɪn
n. 1. A long, narrow strap attached to a bridle, used to control a horse.
n. 2. (often plural) A means of restraint or guidance.
vt. 1. To check or guide (a horse) using reins.
vt. 2. To restrain or control something.
The word "rein" traces back to Old French resne or rene, derived from Latin retinēre ("to hold back"). The core idea of "restraint" or "guidance" has persisted through its evolution, reflecting its literal use for horse control and metaphorical extension to broader contexts of authority or limitation.
She pulled gently on the reins to slow the horse.
The government tightened the reins on public spending.
He struggled to rein in his temper during the debate.
The CEO gave her team free rein to innovate.
Keep a firm rein on your emotions in negotiations.