4
repressive(adjective, restrictive)
4
steep(adjective, informal, expensive, high-priced, pricey)
4
suppressive(adjective, restrictive)
4
unreasonable(adjective, expensive, high-priced, pricey, pricely)
3
astronomical(adjective, extraordinary, extreme, expensive, high-priced)
3
deterrent
3
difficult(adjective, hard, tough, problematic, trying)
3
extreme(adjective, extraordinary, expensive, high-priced, pricey)
3
immoderate(adjective, expensive, high-priced, pricey, pricely)
3
inhibitory
3
inordinate(adjective, expensive, high-priced, pricey, pricely)
3
interdictory
3
narrow
3
overpriced(adjective, expensive, high-priced, pricey, pricely)
3
preclusive
3
prohibiting(adjective, restrictive)
3
restraining(adjective, restrictive)
3
stiff(adjective, tough, extraordinary, extreme, grim)
3
unconscionable(adjective, expensive, high-priced, pricey, pricely)
3
usurious(adjective, expensive, high-priced, pricey, pricely)
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APASmart Define. (2015). prohibitive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/prohibitive/thesaurus/synonyms
ChicagoSmart Define. 2015. "prohibitive thesaurus" https://smartdefine.org/prohibitive/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, prohibitive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/prohibitive/thesaurus/synonyms>.
MLASmart Define. "prohibitive thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/prohibitive/thesaurus/synonyms>