| constrict | (verb) become tight or as if tight | Synonyms: constringe, narrow |
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| (verb) squeeze or press together | Synonyms: compact, compress, contract, press, squeeze |
| constricted | (adjective) drawn together or squeezed physically or by extension psychologically | - |
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| (adjective) especially tense; especially in some dialects | - |
| constricting | (adjective) (of circumstances) tending to constrict freedom | Synonyms: constrictive, narrowing |
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| constriction | (noun) the action or process of compressing | - |
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| (noun) a tight feeling in some part of the body | Synonyms: tightness |
| (noun) tight or narrow compression | Synonyms: coarctation |
| (noun) a narrowing that reduces the flow through a channel | Synonyms: bottleneck, chokepoint |
| constrictive | (adjective) (of circumstances) tending to constrict freedom | Synonyms: constricting, narrowing |
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| (adjective) restricting the scope or freedom of action | Synonyms: confining, constraining, limiting, restricting |
| constrictor | (noun) any of various large nonvenomous snakes that kill their prey by crushing it in its coils | - |
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| derestrict | (verb) make free from restrictions | - |
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| district | (noun) a region marked off for administrative or other purposes | Synonyms: dominion, territorial dominion, territory |
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| (verb) regulate housing in; of certain areas of towns | Synonyms: zone |
| friction | (noun) effort expended in moving one object over another with pressure | Synonyms: detrition, rubbing |
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| (noun) the resistance encountered when one body is moved in contact with another | Synonyms: rubbing |
| (noun) a state of conflict between persons | Synonyms: clash |
| frictional | (adjective) pertaining to or worked or produced by friction | - |
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| frictionless | (adjective) lacking all friction | - |
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| nonrestrictive | (adjective) not limiting the reference of a modified word or phrase | - |
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| restrict | (verb) place limits on (extent or amount or access) | Synonyms: bound, confine, limit, throttle, trammel |
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| (verb) place restrictions on | Synonyms: curb, curtail, cut back |
| (verb) place under restrictions; limit access to by law | Synonyms: control |
| (verb) prevent (information) from being circulated or disclosed | - |
| restricted | (adjective) subject to restriction or subjected to restriction | - |
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| (adjective) the lowest level of official classification for documents | - |
| (adjective) restricted in meaning; (as e.g. `man' in `a tall man') | Synonyms: qualified |
| restricting | (adjective) restricting the scope or freedom of action | Synonyms: confining, constraining, constrictive, limiting |
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| restriction | (noun) an act of limiting or restricting (as by regulation) | Synonyms: limitation |
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| (noun) the act of keeping something within specified bounds (by force if necessary) | Synonyms: confinement |
| (noun) a principle that limits the extent of something | Synonyms: limitation |
| restrictive | (adjective) serving to restrict | - |
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| (adjective) (of tariff) protective of national interests by restricting imports | - |
| restrictively | (adverb) in a restrictive manner | - |
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| restrictiveness | (noun) a lack of permissiveness or indulgence and a tendency to confine behavior within certain specified limits | Synonyms: unpermissiveness |
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| (noun) a grammatical qualification that makes the meaning more specific (`red hat' has a more specific meaning than `hat') | - |
| rictus | (noun) a gaping grimace | - |
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| sericterium | (noun) silk-producing gland of insects (especially of a silkworm) or spiders | Synonyms: serictery, silk gland |
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| serictery | (noun) silk-producing gland of insects (especially of a silkworm) or spiders | Synonyms: sericterium, silk gland |
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| strict | (adjective) characterized by strictness, severity, or restraint | Synonyms: nonindulgent |
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| (adjective) severe and unremitting in making demands | Synonyms: exacting, stern |
| (adjective) rigidly accurate; allowing no deviation from a standard | Synonyms: rigorous |
| (adjective) incapable of compromise or flexibility | Synonyms: rigid |
| (adjective) (of rules) stringently enforced | Synonyms: hard-and-fast |
| strictly | (adverb) restricted to something | Synonyms: purely |
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| (adverb) in a rigorous manner | Synonyms: rigorously |
| (adverb) in a stringent manner | Synonyms: stringently |
| strictness | (noun) uncompromising resolution | Synonyms: sternness |
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| (noun) conscientious attention to rules and details | Synonyms: stringency |
| stricture | (noun) severe criticism | - |
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| (noun) abnormal narrowing of a bodily canal or passageway | Synonyms: stenosis |
| unconstricted | (adjective) not constricted physically or by extension psychologically | - |
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| unrestricted | (adjective) not subject to or subjected to restriction | - |
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| (adjective) free of restrictions on conduct | - |
| (adjective) not restricted or exclusive | Synonyms: unexclusive |
| (adjective) never having had security classification | Synonyms: nonsensitive |
| (adjective) not restricted or modified in meaning | - |
| unrestrictive | (adjective) not tending to restrict | - |
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| vasoconstriction | (noun) decrease in the diameter of blood vessels | - |
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| vasoconstrictive | (noun) any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure | Synonyms: pressor, vasoconstrictor |
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| vasoconstrictor | (noun) any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure | Synonyms: pressor, vasoconstrictive |
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