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Verb: tighten up
  1. (of laws or regulations) make more restrictive, or impose greater penalties
    "tighten up the regulations";
    - stiffen, tighten, constrain

Derived forms: tightens up, tightened up, tightening up

Type of: bound, confine, limit, restrict, throttle, trammel

Nearest

tigerish
Tigers
tiger-striped
tight
tight end
tight money
tight-arse
tightass
tighten
tighten one's belt
tighten up
tightener
tightening
tightfisted
tightfistedness
tightfitting
tight-fitting
tight-knit
tight-laced
tightlipped
tightly