| verb | keep under control; keep in check “suppress a smile” |
| verb | place limits on (extent or access) “restrict the use of this parking lot” |
| verb | to close within bounds, limit or hold back from movement “This holds the local until the express passengers change trains” |
| verb | hold back |
| verb | to compel or deter by or as if by threats |
| adjective | cool and formal in manner |
| adjective | under restraint |
| adjective | marked by avoidance of extravagance or extremes “moderate in his demands” |
| adjective | not showy or obtrusive “clothes in quiet good taste” |
| adjective | prudent “guarded optimism” |
| restrainer | noun | a person who directs and restrains |
| restraint | noun | the act of controlling by restraining someone or something |
| restrictive | adjective | serving to restrict |
| restriction | noun | the act of keeping something within specified bounds (by force if necessary) |
| 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 |
| hold | noun | a state of being confined (usually for a short time) |
| intimidation | noun | a communication that makes you afraid to try something |
| moderateness | noun | quality of being moderate and avoiding extremes |