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Verb: slacken  sla-kun
  1. Become slow or slower
    - slow, slow down, slow up, slack
  2. Make less active or fast
    "He slackened his pace as he got tired";
    - slack, slack up, relax
  3. Become looser or slack
    "the rope slackened"
  4. Make slack as by lessening tension or firmness
    - remit

Derived forms: slackens, slackened, slackening

See also: slacken off

Type of: decrease, lessen, loose, loosen, minify, weaken

Encyclopedia: Slacken