limitless

adjective

1. 1

   seemingly boundless in amount, number, degree, or especially extent

   unbounded enthusiasm

   children with boundless energy

2. 2

   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

3. 3

   without limits in extent or size or quantity

   limitless vastness of our solar system