limitless
1. [ adjective ] without limits in extent or size or quantity
Synonyms: measureless unmeasured illimitable
Examples:

"immeasurable vastness of our solar system"

Related terms: immeasurable
2. [ adjective ] having no limits in range or scope
Synonyms: unlimited
Examples:

"to start with a theory of unlimited freedom is to end up with unlimited despotism"- Philip Rahv "the limitless reaches of outer space"

Related terms: limited untrammeled oceanic bottomless
3. [ adjective ] seemingly boundless in amount, number, degree, or especially extent
Synonyms: unbounded boundless
Examples:

"unbounded enthusiasm" "children with boundless energy" "a limitless supply of money"

Related terms: infinite