What is a verb of restrictive?

There isn't a single verb that means "restrictive." The concept of being restrictive is usually expressed through other verbs and phrases. Here are some examples:

Verbs:

* Limit: "The government limited the amount of sugar that can be imported."

* Restrict: "The new law restricts the use of fireworks."

* Confine: "He was confined to his room."

* Control: "The parents control their child's access to the internet."

* Curtail: "The company curtailed its spending."

* Constrain: "The laws constrain our freedom."

* Suppress: "The government suppressed the protests."

* Censor: "The book was censored for its offensive content."

* Obstruct: "The protesters obstructed traffic."

Phrases:

* Place limits on: "The school placed limits on the use of cell phones."

* Impose restrictions on: "The city imposed restrictions on parking."

* Put constraints on: "The budget put constraints on our plans."

* Tighten the screws on: "The government tightened the screws on immigration."

* Crack down on: "The police cracked down on illegal gambling."

The best verb or phrase to use depends on the specific context and what you want to emphasize.