tighten

1. Make tight or tighter (synset 200421085)
   "Tighten the wire"
   is a type of: alter, change, modify - cause to change; make different; cause a transformation
   subtypes:

   • frap - take up the slack of
   • firm, tauten - make taut or tauter
   • screw - tighten or fasten by means of screwing motions
   • wind, wind up - coil the spring of (some mechanical device) by turning a stem
   same as: fasten
2. Become tight or tighter (synset 200420903)
   "The rope tightened"
   is a type of: change - undergo a change; become different in essence; losing one's or its original nature
   subtypes:

   • constrict, constringe, narrow - become tight or as if tight
   • firm, tauten - become taut or tauter
   • compact, compress, constrict, contract, press, squeeze - squeeze or press together
   • strain, tense - become stretched or tense or taut
3. Severely restrict in scope or extent (synset 200419690)
   "tighten the rules"; "stiffen the regulations"
   is a type of: bound, confine, limit, restrict, throttle, trammel - place limits on (extent or amount or access)
   same as: constrain, stiffen, tighten up
4. Narrow or limit (synset 200233575)
   "reduce the influx of foreigners"
   is a type of: bound, confine, limit, restrict, throttle, trammel - place limits on (extent or amount or access)
   same as: reduce

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