What is not doubted; not called in question; indubitable; indisputable; as, undoubted proof; undoubted hero. -- Un*doubt"ed*ly, adv called?

undoubted — Not doubted; not called in question; indubitable; indisputable; as, undoubted proof; undoubted hero. -- Un*doubt"ed*ly, adv. (Webster's 1913.)

Sources