The lack of a unified opposition may make the chaos harder for Morsi to rein in.
Parents don't medicate kids because they are lazy parents and think the pills will rein in unruly kids.
While Lorde has the raw talent and songwriting ability, Little helped “rein in my writing and make it more accessible,” she says.
c.1300, "strap fastened to a bridle," from Old French rene, resne "reins, bridle strap, laces" (Modern French rêne), probably from Vulgar Latin *retina "a bond, check," back-formation from Latin retinere "hold back" (see retain). To give something free rein is originally of horses.
c.1300, from rein (n.). Figurative extension "put a check on" first recorded 1580s. Related: Reined; reining. To rein up "halt" (1550s) is from the way to make a horse stop by pulling up on the reins.
The kidneys, loins, or lower back.
the kidneys, the supposed seat of the desires and affections; used metaphorically for "heart." The "reins" and the "heart" are often mentioned together, as denoting the whole moral constitution of man (Ps. 7:9; 16:7; 26:2; 139:13; Jer. 17:10, etc.).