resolute

Synonyms: adamant bold constant courageous dead set on decided dogged faithful firm fixed immutable inflexible intent upon intrepid loyal meaning business obstinate persevering persistent persisting purposeful relentless resolved serious set settled staunch steadfast steady strong stubborn tenacious true unbending unchanging uncompromising undaunted unfaltering unflagging unflinching unshakable unshaken unwavering unyielding valiant

Antonyms: afraid cautious cowardly irresolute weak