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1
underlying(adjective, important, significant, original, essential)
1
vital(adjective, important, significant, original, essential)
0
deep(original, basic)
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deep-seated(original, basic)
<123>
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APASmart Define. (2015). sustaining thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sustaining/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustaining thesaurus" https://smartdefine.org/sustaining/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, sustaining thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sustaining/thesaurus/synonyms>.
MLASmart Define. "sustaining thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/sustaining/thesaurus/synonyms>