inacceptable

From in- +‎ acceptable.^[1]

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inacceptable (comparative more inacceptable, superlative most inacceptable)

1. (now proscribed and nonstandard) Unacceptable. [from 1578]^[1]
   • 1657, Joannes Renodæus [i.e., Jean de Renou], translated by Richard Tomlinson, “Of the faculties of Medicaments, and how many sorts there be accordingly”, in A Medicinal Dispensatory, Containing the Whole Body of Physick: […], London: […] Jo[hn] Streater and Ja[mes] Cottrel, book I ([…]), page 10:

     And there is ſuch an antipathy betwixt our nature and Purgations, that the very ſmell of them is inacceptable; […]

• unacceptable (more common)

• acceptable

From in- +‎ acceptable.

• IPA^(key): (Central, Balearic) [i.nək.səpˈtab.blə]
• IPA^(key): (Valencia) [i.nak.sepˈta.ble]

inacceptable m or f (masculine and feminine plural inacceptables)

1. unacceptable

   Antonym: acceptable

• “inacceptable”, in Diccionari de la llengua catalana [Dictionary of the Catalan Language] (in Catalan), second edition, Institute of Catalan Studies [Catalan: Institut d'Estudis Catalans], April 2007
• “inacceptable”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025
• “inacceptable” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
• “inacceptable” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

From in- +‎ acceptable.

• IPA^(key): /i.nak.sɛp.tabl/

inacceptable (plural inacceptables)

1. unacceptable

   Synonym: inadmissible

• “inacceptable”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.