IPA: /ˈkaʊnt.ləs.li/
KK: /ˈkaʊnt.ləs.li/
In a way that cannot be counted; infinitely or endlessly.
The stars in the sky seem to shine countlessly, creating a beautiful view.
Countlessly → It is formed from "count" (from Old French *conter*, meaning to enumerate or tell) and "-less" (meaning without). The word "countlessly" means without limit in counting or enumeration.
Think of counting something and remember that 'countlessly' means there is no limit to how much you can count.