not variable; not changing or capable of being changed; static or constant.


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 for invariable

Antonyms for invariable

1. changing. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for invariably

Contemporary Examples of invariably

Historical Examples of invariably

  • It may serve as a sample of his wool, for invariably it is home made.

  • He invariably encouraged humour, this genial philanthropist.

    The Slave Of The Lamp

    Henry Seton Merriman

  • This has been invariably done by navigators and is a most necessary proceeding.

    The Field of Ice

    Jules Verne

  • When that sort of man goes into business he invariably gets into trouble.

    Roden's Corner

    Henry Seton Merriman

  • At first she invariably kept him in a lower drawer of my bureau.

    Concerning Cats

    Helen M. Winslow

British Dictionary definitions for invariably



always; without exception



not subject to alteration; unchanging


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 invariably



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