(a.) Assured by or of one's self; self-reliant; complacent.

arrogant assured balanced cocksure collected composed confident convinced decided determined equanimous equilibrious hubristic levelheaded overconfident oversure overweening persuaded poised pompous positive proud reassured recollected sanguine secure self-confident self-controlled self-important self-possessed self-reliant self-restrained self-satisfied smug sure together unafraid undoubtful undoubting unfaltering unhesitating unwavering well-balanced