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adj. Without quailing; brave.

"For none that was familiarly conversant with Dionysius but scorned him for his life of idle amusement with wine, women, and dice; whereas it required an heroic soul and a truly intrepid and unquailing spirit so much as to entertain the thought of crushing Caesar so formidable for his ability, his power, and his fortune, whose very name disturbed the slumbers of the Parthian and Indian kings."

unavailing    unfailing   

unquailingly   

smooth-flowing    incontestible    ill-boding    possest    heaven-directed