From invariable + -ly.

• (America) IPA: /ɪnˈvɛɹ.i.ə.bli/
• (RP) IPA: /ɪnˈvɛə.ɹi.ə.bli/
• (colloquial or dialectal) IPA: /ɪnˈvɛ(ə).ɹə.bli/

invariably (not comparable)

1. Every time; always, without change.

   He is invariably late for meetings.

   • 1907 August, Robert W[illiam] Chambers, chapter IX, in The Younger Set, New York, N.Y.: D. Appleton & Company, →OCLC ↗:

     “A tight little craft,” was Austin’s invariable comment on the matron; […]. ¶ Near her wandered her husband, orientally bland, invariably affable, and from time to time squinting sideways, as usual, in the ever-renewed expectation that he might catch a glimpse of his stiff, retroussé moustache.

• invariously, uniformly; See also Thesaurus:uniformly

• French: invariablement
• Russian: неизме́нно
• Spanish: invariablemente