sure

adj

1.
having or feeling no doubt or uncertainty; confident and assured
Antonym:
unsure
Derived from:
sureness
2.
exercising or taking care great enough to bring assurance
3.
certain to occur; destined or inevitable
4.
physically secure or dependable
5.
reliable in operation or effect
6.
(of persons) worthy of trust or confidence
7.
infallible or unfailing
Derived from:
sureness
8.
certain not to fail
Derived from:
sureness
9.
impossible to doubt or dispute