noun, feminine/ˈrjenda/plural: riendas
rein(s) (strap or rope attached to a bridle or bit and used to control an animal, especially a horse); control, direction
“Toma las riendas del caballo y lárgate.” — Take the reins of the horse, and go away.
Inherited from Old Spanish rienda (“reins”, often singular), inherited from Early Medieval Latin retina (via */ˈrɛd(e)na/, with metathesis of /dn/; compare Spanish candado < cadnado < Latin catēnātum), a noun derived from Latin retinēre (“hold back, restrain”). Compare Portuguese rédea.