indeclinable
in·de·clin·a·ble
(ĭn′dĭ-klī′nə-bəl)adj.
1. Without grammatical inflection.
2. Of or being a word that lacks grammatical inflection though belonging to a form class whose members are usually inflected.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
indeclinable
(ˌɪndɪˈklaɪnəbəl)adj
(Grammar) (of a noun or pronoun) having only one form; not declined for case or number
ˌindeˈclinableness n
ˌindeˈclinably adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
in•de•clin•a•ble
(ˌɪn dɪˈklaɪ nə bəl)adj.
not capable of being declined grammatically; having no inflected forms.
[1520–30; < Late Latin]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Translations
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
indeclinable
adj (Gram) → nicht deklinierbar, unbeugbar, beugungsunfähig
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007