Find Antonyms

slacken Antonyms

Opposite of slacken

Because the opposite of slacken shifts with each meaning, the 9 antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• verb (Context 1)

To make or become looser or less taut (as of a rope, muscle, or grip).

Usage Example

"The sailors had to tighten the ropes as the wind shifted direction."

Strongest
tighten
tauten
Strong
stiffen
tense

• verb (Context 2)

To reduce or diminish in speed, intensity, effort, or activity.

Usage Example

"The runners began to intensify their pace as they approached the steep hill."

Strongest
intensify
accelerate
quicken
Strong
increase
speed up

Similar words to slacken

Words similar to slacken shift depending on context. Common synonyms include:

loosen
subside
relax
abate
lessen
let up
diminish
ease
See all synonyms of slacken

• Nearby Words

skyway
slab
slack
slacken
slacker
slackly
slackness

Cite this Entry

Wordmom. (2026). Antonyms for Slacken. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/slacken
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