having or feeling no doubt or uncertainty; confident and assured
certain to occur; destined or inevitable
exercising or taking care great enough to bring assurance
reliable in operation or effect
established irrevocably
definite but not specified or identified
established beyond doubt or question; definitely known
uncertainty about the truth or factuality or existence of something
the state of being unsure of something
consider unlikely or have doubts about
lack confidence in or have doubts about