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Synonyms

slacken

American  
[slak-uhn] / ˈslæk ən /

verb (used with or without object)

  1. to make or become less active, vigorous, intense, etc.

    Synonyms:
    abate, slack, loosen, relax
  2. to make or become looser or less taut.

    Synonyms:
    abate, slack, loosen, relax
    Antonyms:
    tense, tighten

slacken British  
/ ˈslækən /

verb

  1. to make or become looser

  2. to make or become slower, less intense, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • unslackened adjective
  • unslackening adjective

Etymology

Origin of slacken

First recorded in 1570–80; slack 1 + -en 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

You absolutely must allow your lower face to slacken naturally, which may be right around the moment Kardashian parts her artificially plumped lips to make a heroic attempt at acting.

From Salon • Nov. 6, 2025

The onions will slacken and sweeten over indirect heat while he assembles the rest.

From The Wall Street Journal • Oct. 31, 2025

The report cautioned that it is too early to determine what caused the rate to slacken.

From BBC • Dec. 11, 2024

And, with the tight job market starting to slacken, some predict 2024 will be the year employers finally clamp down.

From Los Angeles Times • Jan. 4, 2024

He hurried away from them with a shiver of eerie alarm and did not slacken his pace until the soil crumbled to dry sand beneath his feet and they had been left behind.

From "Catch-22" by Joseph Heller