Example sentences:

Ramayana:  The demons led by Khara and Dushaana charged towards Rama and towards certain death, determined to preserve their reputation of being dauntless warriors.

Mahabharata:  Priding himself as a dauntless fighter, Duryodhana single-handedly fought on against the Gandharvas, but was soon arrested.

Bhagavad-gita:  Only if we are dauntless can we endure the scare tactics of our mind and senses, and succeed in the war to control them.