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Impermissible has 8 synonyms. The top synonyms for impermissible are unmentionable, inadmissible, untouchable, proscribed, prohibited, forbidden, taboo, tabu. Another word for impermissible is unmentionable. Browse the full list below.
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| Random | DefinitionA common synonym for impermissible is unmentionable. Other synonyms include inadmissible, untouchable, proscribed, prohibited.
Impermissible has 8 synonyms listed on Thesaurasize.
(adj): not permissible; not to be permitted or allowed
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