invariable

in- +‎ variable

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invariable (not comparable)

1. Not variable; unalterable; uniform; always having the same value.
   • Isaac Taylor (1787–1865)

     Physical laws which are invariable.

   • 1907, Robert William Chambers, chapter IX, in The Younger Set, New York, N.Y.: D. Appleton & Company, OCLC 24962326:

     “A tight little craft,” was Austin’s invariable comment on the matron; and she looked it, always trim and trig and smooth of surface like a converted yacht cleared for action.

2. (mathematics) Constant.
3. (by extension, grammar, of a word, or a grammatical class) That cannot undergo inflection, conjugation or declension.

   The French adjective marron (brown) is invariable: it does not take the usual s in the plural.

• For quotations of use of this term, see Citations:invariable.

invariable (plural invariables)

1. Something that does not vary; a constant.

• invariant

in- +‎ variable

• IPA^(key): /ɛ̃.va.ʁjabl/

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invariable (plural invariables)

1. invariable

• “invariable” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

invariable (plural invariables)

1. invariable