Certain

1. Unfailing; infallible.
2. Actually existing; sure to happen; inevitable.
3. A certain number or quantity.
4. Certainty.
5. Certainly.
6. Fixed or stated; regular; determinate.
7. Assured in mind; having no doubts; free from suspicions concerning.
8. Not to be doubted or denied; established as a fact.
9. Determined; resolved; -- used with an infinitive.
10. Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.