seemingly boundless in amount, number, degree, or especially extent; "unbounded enthusiasm"; "children with boundless energy"; "a limitless supply of money"
If you describe something as limitless, you mean that there is or appears to be so much of it that it will never be exhausted. a cheap and potentially limitless supply of energy The opportunities are limitless. = endless. without a limit or end = infinite
having no limits in range or scope; "to start with a theory of unlimited freedom is to end up with unlimited despotism"- Philip Rahv; "the limitless reaches of outer space"