a. Incapable of being daunted; undaunted; bold; fearless; intrepid. [ 1913 Webster ]

Dauntless he rose, and to the fight returned. Dryden.

-- Daunt"less*ly, adv. -- Daunt"less*ness, n. [ 1913 Webster ]

n. resolute courageousness.
Syn. -- intrepidity. [ WordNet 1.5 ]