From in- + numerable; from Middle English innumerable, from Latin innumerābilis, from in- + numerābilis.

• (America) IPA: /ɪˈnuːməɹ.əbəl/
• (British) IPA: /ɪˈnjuːməɹ.əbəl/

innumerable

1. Not capable of being counted, enumerated, or numbered

   The casualties of the Second World War were so great that they are innumerable.

   • 1889, Mark Twain [pseudonym; Samuel Langhorne Clemens], A Connecticut Yankee in King Arthur's Court, New York, N.Y.: Charles L. Webster & Company, →OCLC ↗:

     Soon we could see the innumerable banners fluttering, and then the sun struck the sea of armor and set it all aflash.

2. Of a very high number; extremely numerous

• countless, numberless, unnumbered, untold; see also Thesaurus:innumerable