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[in-di-klahy-nuh-buh l] /ˌɪn dɪˈklaɪ nə bəl/
adjective, Grammar
not capable of being declined; having no inflected forms: used especially of a word belonging to a form class most of whose members are declined, as the Latin adjective decem, “ten.”.
Origin of indeclinable
late Middle English
1400-50; late Middle English < Latin indēclīnābilis unchangeable, inflexible. See in-3, declinable
Related forms
indeclinableness, noun
indeclinably, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for indeclinable
Historical Examples
  • Mīlle is regularly an adjective in the Singular, and indeclinable.

    New Latin Grammar Charles E. Bennett
  • Of these, the first five are declinable; the other four are indeclinable.

    Elements of Gaelic Grammar Alexander Stewart
  • The indeclinable, remain as simple adjuncts to the verbs, and the latter put on the negative form.

    The Indian in his Wigwam Henry R. Schoolcraft
  • The genitives his (his, its), hiere (her), hiera (their) are used as indeclinable possessives.

    Anglo-Saxon Primer Henry Sweet
British Dictionary definitions for indeclinable


(of a noun or pronoun) having only one form; not declined for case or number
Derived Forms
indeclinableness, noun
indeclinably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for indeclinable

late 14c., originally in grammar, from French indéclinable, from Latin indeclinabilis, from indeclinatus "unchanged, constant," from in- "not, opposite of" (see in- (1)) + declinatus, from declinare (see decline (v.)). Related: Indeclinably.

Online Etymology Dictionary, © 2010 Douglas Harper
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