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2 entries under riskless topic. ×

1
ineffective(adjective, useless, unpolluted, vain, unsuccessful)
0
inefficacious(inadequate, feeble, useless, unpolluted, vain)
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APASmart Define. (2011). slack-spined thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/slack-spined/thesaurus/synonyms
ChicagoSmart Define. 2011. "slack-spined thesaurus" https://smartdefine.org/slack-spined/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2011, slack-spined thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/slack-spined/thesaurus/synonyms>.
MLASmart Define. "slack-spined thesaurus" 23 May 2011. Web. 29 September 2026. <https://smartdefine.org/slack-spined/thesaurus/synonyms>