Sure
Definition of sure:
part of speech: adjective
SURE, SURELY.
part of speech: noun
part of speech: adjective
Certain; absolutely confident; secure; unfailing.
part of speech: adjective
Confident beyond doubt; as, I am sure it is true; certain; as, he is sure to succeed; reliable; as, this is a sure investment; firmly fixed; not likely to change or fail.
part of speech: adjective
Secure: fit to be depended on: certain: strong: confident beyond doubt.