tighten the reins

to start to control something or someone more carefully (often + on ) She has tightened the reins on her younger sons in an effort to curb their wild behaviour before it's too late.

Common Names:

Name	Pronounced	Usage
Cash	[kæʃ]
Gerald	['dʒerəld]
Canan	-	Turkish
Githa	-	English (Archaic)
Wawrzyniec	vahf-ZHIN-yets	Polish
Burkhart	BOORK-hahrt (German)	German, Ancient Germanic