SLACKEN Synonyms: 72 Similar and Opposite Words

slacken

verb

ˈsla-kən

Definition of slacken next

as in to loosen

to make less taut you'll need to slacken the rope a bit to get it free of that post

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in to slow

to cause to move or proceed at a less rapid pace drivers need to slacken their speed as they approach the sharp curve

Synonyms & Similar Words

Antonyms & Near Antonyms

Synonym Chooser

How is the word slacken distinct from other similar verbs?

Some common synonyms of slacken are delay, detain, retard, and slow. While all these words mean "to cause to be late or behind in movement or progress," slacken suggests an easing up or relaxing of power or effort.

on hot days runners slacken their pace

Where would delay be a reasonable alternative to slacken?

Although the words delay and slacken have much in common, delay implies a holding back, usually by interference, from completion or arrival.

bad weather delayed our arrival

When is it sensible to use detain instead of slacken?

While in some cases nearly identical to slacken, detain implies a holding back beyond a reasonable or appointed time.

unexpected business had detained her

When would retard be a good substitute for slacken?

The synonyms retard and slacken are sometimes interchangeable, but retard suggests reduction of speed without actual stopping.

language barriers retarded their progress

How do slow and slacken relate to one another?

Both slow and slacken also imply a reduction of speed, slow often suggesting deliberate intention.

medication slowed the patient's heart rate

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of slacken The potential for sharp, disputatious cultural criticism has arguably slackened. —

David Remnick, New Yorker, 2 Sep. 2025 Powell’s appearance is expected to provide insight into whether the Fed will slacken its monetary policy and cut interest rates, which have been held between 4.25% and 4.5% since December. —

Ty Roush, Forbes.com, 21 Aug. 2025 However, despite high prices, consumer demand for beef has yet to meaningfully slacken, especially with the summer grilling months. —

Reia Li, AZCentral.com, 12 Aug. 2025 In this sense, most varieties of OCD amount to a fear of self-loss, a worry that the coils holding you in place will slacken and permit you to do something monstrous; thus such OCD sufferers fret less about being victims of mass shootings than about being the shooter. —

Andrew Kay, Harpers Magazine, 28 May 2025 See All Example Sentences for slacken

Recent Examples of Synonyms for slacken

Verb

This will loosen any bits on the bottom of the oven.

— Karen Brewer Grossman, Southern Living, 14 Jan. 2026
South Korea could use this as an opportunity to press China to loosen its informal restrictions on Korean entertainment from 2016 or to get China firmly on board with North Korean denuclearization.

— Miranda Jeyaretnam, Time, 13 Jan. 2026