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Slacken has 162 synonyms. The top synonyms for slacken are worsen, weaken, water down, wane, unwind, untune, untighten, unstring and 154 more. Another word for slacken is worsen. Browse the full list below.
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| Random | DefinitionA common synonym for slacken is worsen. Other synonyms include weaken, water down, wane, unwind.
Slacken has 162 synonyms listed on Thesaurasize.
(v): to gradually decrease in intensity; to become slack; to reduce the intensity (of something) Example: "the pace slackened."
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