limitless

without limits in extent or size or quantity

• “immeasurable vastness of our solar system”

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”

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

• “unbounded enthusiasm”
• “children with boundless energy”
• “a limitless supply of money”