| verb | place restrictions on “curtail drinking in school” |
| verb | place under restrictions; limit access to “This substance is controlled” |
| verb | place limits on (extent or access) “restrict the use of this parking lot” |
| verb | make more specific “qualify these remarks” |
| adjective | restricting the scope or freedom of action |
| restrictive | adjective | serving to restrict |
| restriction | noun | an act of limiting or restricting (as by regulation) |
| curb | noun | the act of restraining power or action or limiting excess |
| restrainer | noun | a person who directs and restrains |
| trammel | noun | a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner) |
| limiter | noun | (electronics) a nonlinear electronic circuit whose output is limited in amplitude; used to limit the instantaneous amplitude of a waveform (to clip off the peaks of a waveform) |
| limit | noun | the greatest possible degree of something |
| limitation | noun | (law) a time period after which suits cannot be brought |
| bound | noun | a line determining the limits of an area |
| qualification | noun | the act of modifying or changing the strength of some idea |
| quality | noun | a characteristic property that defines the apparent individual nature of something |