assured in mind; having no doubts; free from suspicions concerning.-determined; resolved; -- used with an infinitive.-not to be doubted or denied; established as a fact.-actually existing; sure to happen; inevitable.-unfailing; infallible.-fixed or stated; regular; determinate.-not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.-certainty.-a certain number or quantity.-certainly.