adjective

innumerable

in-NOO-mer-uh-bul/ɪˈnuːmərəbl/

Too many to be counted.

The sand stretches into the distance, its innumerable grains merging into a dense expanse.

A close, low-angle view across a vast expanse of sand: distinct foreground grains merge into an overwhelmingly dense field of tiny grains extending into the distance, visibly beyond practical counting.

Etymology

inLatinnot

+numerLatinto count

+ableLatincapable of being

The pieces say “not capable of being counted.” They describe a quantity so great that counting it is beyond reach, rather than merely something not yet counted.

In context

Enhanced Public Domain525:23

what were the usual causes or motives that made one country go to war with another I answered they were innumerable but I should only mention a few of the chief

1700s Satire: Jonathan Swift - Gulliver's Travels (Audiobook)

More examples

She has heard that excuse innumerable times.
The project faces innumerable obstacles.
Innumerable tiny shells cover the beach.

Forms

innumerable

Similar words

countless: Means the same thing but sounds less formal.
numerous: Means many, without suggesting that counting them is impossible.