- 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"
Antonyms: irresolute, discouraged, infirm, unstable, vacillant, vacillating, wavering, weak-kneed
- unhesitating, resolute - characterized by quickness and firmness; "his reply was unhesitating"
Antonym: indecisive (indirect, via decisive)