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invariable

[in-vair-ee-uh-buh l]
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adjective
  1. not variable; not changing or capable of being changed; static or constant.
noun
  1. something that is invariable; a constant.

Origin of invariable

late Middle English word dating back to 1400–50; see origin at in-3, variable
Related formsin·var·i·a·bil·i·ty, in·var·i·a·ble·ness, nounin·var·i·a·bly, adverb

Synonyms

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1. unalterable, unchanging, changeless, invariant, unvarying, immutable.

Antonyms

1. changing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for invariability

Historical Examples

  • These manœuvres are repeated with a striking degree of invariability.

    Wasps

    George W. Peckham

  • It is founded on the absolute integrity and invariability of nature.

  • This object is attained by the invariability of the adjectives, and especially by composition.

    Basque Legends

    Wentworth Webster

  • The invariability of the belief is with him the real guarantee.

  • By the growth of a practical feeling of the invariability of natural laws.


British Dictionary definitions for invariability

invariable

adjective
  1. not subject to alteration; unchanging
noun
  1. a mathematical quantity having an unchanging value; a constant
Derived Formsinvariability or invariableness, noun
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

Word Origin and History for invariability

n.

1640s, from invariable + -ity.

invariable

adj.

early 15c., from Old French invariable (14c.) and directly from Medieval Latin invariabilis, from in- "not, opposite of" (see in- (1)) + variabilis (see variable). Related: Invariably.

Online Etymology Dictionary, © 2010 Douglas Harper