cer·tain /ˈsɝtṇ/
 (a.)肯定的,確信的,有把握的,一定的,必然的
 Cer·tain a.
 1. Assured in mind; having no doubts; free from suspicions concerning.
    To make her certain of the sad event.   --Dryden.
    I myself am certain of you.   --Wyclif.
 2. Determined; resolved; -- used with an infinitive.
 However, I with thee have fixed my lot,
 Certain to undergo like doom.   --Milton.
 3. Not to be doubted or denied; established as a fact.
    The dream is certain, and the interpretation thereof sure.   --Dan. ii. 45.
 4. Actually existing; sure to happen; inevitable.
 Virtue that directs our ways
 Through certain dangers to uncertain praise.   --Dryden.
    Death, as the Psalmist saith, is certain to all.   --Shak.
 5. Unfailing; infallible.
    I have often wished that I knew as certain a remedy for any other distemper.   --Mead.
 6. Fixed or stated; regular; determinate.
    The people go out and gather a certain rate every day.   --Ex. xvi. 4.
 7. Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.
    It came to pass when he was in a certain city.   --Luke. v. 12.
    About everything he wrote there was a certain natural grace und decorum.   --Macaulay.
 For certain, assuredly.
 Of a certain, certainly.
 Syn: -- Bound; sure; true; undeniable; unquestionable; undoubted; plain; indubitable; indisputable; incontrovertible; unhesitating; undoubting; fixed; stated.
 Cer·tain, n.
 1. Certainty. [Obs.]
 2. A certain number or quantity. [Obs.]
 Cer·tain, adv. Certainly. [Obs.]
 ◄ ►
 certain
      adj 1: definite but not specified or identified; "set aside a
             certain sum each week"; "to a certain degree";
             "certain breeds do not make good pets"; "certain
             members have not paid their dues"; "a certain popular
             teacher"; "a certain Mrs. Jones" [syn: certain(a)]
      2: having or feeling no doubt or uncertainty; confident and
         assured; "felt certain of success"; "was sure (or certain)
         she had seen it"; "was very sure in his beliefs"; "sure of
         her friends" [syn: certain(p), sure] [ant: uncertain,
          uncertain]
      3: established beyond doubt or question; definitely known;
         "what is certain is that every effect must have a cause";
         "it is certain that they were on the bus"; "his fate is
         certain"; "the date for the invasion is certain" [syn: certain(p)]
         [ant: uncertain]
      4: certain to occur; destined or inevitable; "he was certain to
         fail"; "his fate is certain"; "In this life nothing is
         certain but death and taxes"- Benjamin Franklin; "he faced
         certain death"; "sudden but sure regret"; "he is sure to
         win" [syn: sure] [ant: uncertain]
      5: established irrevocably; "his fate is sealed" [syn: sealed]
         [ant: unsealed]
      6: capable of being depended on; "a quick and certain remedy";
         "a sure way to distinguish the two"; "wood dust is a sure
         sign of termites" [syn: sure]
      7: exercising or taking care great enough to bring assurance;
         "be certain to disconnect the iron when you are through";
         "be sure to lock the doors" [syn: sure]