1
as in negligence
failure to take the care that a cautious person usually takes
considering the chemical company's slackness when it comes to safety, it's a wonder there hasn't been a catastrophe
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Antonyms & Near Antonyms
2
as in slack
the extent to which something hangs or dips below a straight line
there's simply too much slackness in this clothesline
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Antonyms & Near Antonyms
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Recent Examples of Synonyms for slackness
Noun
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The motion does not address the core negligence and wrongful death claims stemming from the crash itself but seeks to dismiss claims related to emergency dispatch and allegations Riverside County officials failed to protect the victims after the collision.
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Charges have since been dismissed against three, including Nores — all of whom were accused of negligence.
Noun
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My jaw was slack, my eyes were slammed shut, and my tongue hung out, touching the ground.
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As the offense carried the load, the Royals’ bullpen also picked up the slack.
Noun
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Even if the weather is perfect, summer is a busy season that can sometimes cause the garden to experience neglect.
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Supporters portray the Business Improvement District as a fix for years of neglect and crime, while opponents fear gentrification, over-policing and businesses gaining control over public space.
Cite this Entry
“Slackness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/slackness. Accessed 30 Jun. 2026.
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