Illimitable

illimitable \(ˌ)i(l)-ˈli-mə-tə-bəl\ adjective: incapable of being limited or bounded; measureless {the illimitable reaches of space and time}

Etymology: Middle English il- not + limit, from Anglo-French limite, from Latin limit-, limes boundary

Illimitable rolls off the tongue much more pleasurably than unlimited.