• (GA) IPA: /ɪnˈvɛɹ.i.ə.bl̩/
• (RP) IPA: /ɪnˈvɛə.ɹi.ə.bl̩/

invariable (not comparable)

1. Not variable; unalterable; uniform; always having the same value.

   • 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. (math) 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.

• French: invariable
• German: unveränderlich
• Portuguese: invariável
• Russian: неизме́нный

invariable (plural invariables)

1. Something that does not vary; a constant.