1
sagging(adjective, declining, shrinking, lowering, falling)
1
setback
1
shelving
1
shrinkage(noun, drop, decrease, retreat, wane)
1
shrinking(noun, adjective, declining, lowering, falling)
1
shriveling up(expression, adjective, lessening, declining, shrinking)
1
sinking(noun, adjective, drop, decrease, retreat)
1
slack-up
1
slackened
1
slackens
1
slow-down
1
slow up
1
slowing down
1
slowup
1
slumping(adjective, declining, shrinking, lowering, falling)
1
soothing
1
subduement
1
sweep(noun, drop, decrease, retreat, wane)
1
tempering
1
thinning
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APASmart Define. (2015). slackening thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/slackening/thesaurus/synonyms
ChicagoSmart Define. 2015. "slackening thesaurus" https://smartdefine.org/slackening/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, slackening thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/slackening/thesaurus/synonyms>.
MLASmart Define. "slackening thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/slackening/thesaurus/synonyms>