Verb constrain has 2 senses
  1. restrain, encumber, cumber, constrain - hold back
    --1 is one way to restrict, restrain, trammel, limit, bound, confine, throttle
    Sample sentence:
    Somebody ----s something
  2. stiffen, tighten, tighten up, constrain - restrict; "Tighten the rules"; "stiffen the regulations"
    --2 is one way to restrict, restrain, trammel, limit, bound, confine, throttle
    Sample sentence:
    Somebody ----s something
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