restrict

(verb) place restrictions on. Synonyms: curtail, curb, cut back. Example: "Curtail drinking in school."

(verb) place under restrictions; limit access to. Example: "This substance is controlled."

(verb) place limits on (extent or access). Synonyms: restrain, trammel, limit, bound, confine, throttle. Examples: "Restrict the use of this parking lot." "Limit the time you can spend with your friends."

(verb) make more specific. Synonyms: qualify. Example: "Qualify these remarks."