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4
groundbreaking(adjective, old, obsolete, habitual)
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APASmart Define. (2015). stale thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/stale/thesaurus/antonyms
ChicagoSmart Define. 2015. "stale thesaurus" https://smartdefine.org/stale/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, stale thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/stale/thesaurus/antonyms>.
MLASmart Define. "stale thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/stale/thesaurus/antonyms>