resolute -
firm in purpose or belief; characterized by firmness and determination; "stood resolute against the enemy"; "faced with a resolute opposition"; "a resolute and unshakeable faith"
irresolute uncertain how to act or proceed; "the committee was timid and mediocre and irresolute"
courageous,
brave possessing or displaying courage; able to face and deal with danger or fear without flinching; "Familiarity with danger makes a brave man braver but less daring"- Herman Melville; "a frank courageous heart...triumphed over pain"- William Wordsworth; "set a courageous example by leading them safely into and out of enemy-held territory"
decisive determining or having the power to determine an outcome; "cast the decisive vote"; "two factors had a decisive influence"
purposeful having meaning through having an aim; "led a happy purposeful life"
determined having been learned or found or determined especially by investigation
do-or-die,
desperate showing extreme courage; especially of actions courageously undertaken in desperation as a last resort; "made a last desperate attempt to reach the climber"; "the desperate gallantry of our naval task forces marked the turning point in the Pacific war"- G.C.Marshall; "they took heroic measures to save his life"
