1
as in loosens
to make less taut
you'll need to slacken the rope a bit to get it free of that post
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in slows
to cause to move or proceed at a less rapid pace
drivers need to slacken their speed as they approach the sharp curve
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for slackens
Verb
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Fortunately, the BreezyClear Pro is equipped to address all the baby’s needs from the beginning to the end of the decongestion process; by briefly misting the nasal passages, the device loosens mucus so its powerful suction can remove it quickly and without fuss.—
Ethan Stone, USA Today, 28 Oct. 2025
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Ray’s hand loosens its grip on the weapon.—
Verb
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Oats also contain soluble fiber, which slows digestion and helps keep blood sugar levels steady.—
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Stop fertilizing during winter, when the plant's growth slows.—
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“Slackens.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/slackens. Accessed 13 Jan. 2026.
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