a having or feeling no doubt or uncertainty; confident and assured
s exercising or taking care great enough to bring assurance
a certain to occur; destined or inevitable
s physically secure or dependable
s reliable in operation or effect
s (of persons) worthy of trust or confidence
s infallible or unfailing
s certain not to fail
s impossible to doubt or dispute
a. 确信的；可靠的；必定的 (sure的变形)