sure \sure\, a. compar. surer; superl. surest. oe. sur,
   of. se"ur, f. s^ur, l. securus; se aside, without + cura
   care. see secure, and cf. assure, insure, sicker
   sure.
   1. certainly knowing and believing; confident beyond doubt;
      implicity trusting; unquestioning; positive.
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            we are sure that the judgment of god is according to
            truth against them which commit such things. --rom.
                                                  ii. 2.
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            i'm sure care 's an enemy of life.    --shak.
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   2. certain to find or retain; as, to be sure of game; to be
      sure of success; to be sure of life or health.
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   3. fit or worthy to be depended on; certain not to fail or
      disappoint expectation; unfailing; strong; permanent;
      enduring. "his sure word." --keble.
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            the lord will certainly make my lord a sure house;
            because my lord fighteth the battles of the lord.
                                                  --1 sam. xxv.
                                                  28.
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            the testimony of the lord is sure.    --ps. xix. 7.
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            which put in good sure leather sacks. --chapman.
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   4. betrothed; engaged to marry. obs.
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            the king was sure to dame elizabeth lucy, and her
            husband before god.                   --sir t. more.
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            i presume . . . that you had been sure as fast as
            faith could bind you, man and wife.   --brome.
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   5. free from danger; safe; secure.
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            fear not; the forest is not three leagues off;
            if we recover that we are sure enough. --shak.
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   to be sure, or be sure, certainly; without doubt; as,
      shall you do? to be sure i shall.

   to make sure.
      a to make certain; to secure so that there can be no
          failure of the purpose or object. "make cato sure."
          --addison. "a peace can not fail, provided we make
          sure of spain." --sir w. temple.
      b to betroth. obs.
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                she that's made sure to him she loves not well.
                                                  --cotgrave.
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   syn: certain; unfailing; infallible; safe; firm; permanent;
        steady; stable; strong; secure; indisputable; confident;
        positive.
        1913 webster
see also:
surer surest secure assure insure sicker 
to be sure be sure to make sure 

to be sure
     adv : admittedly; "to be sure, he is no einstein" syn: without
           doubt, no doubt
see also:
without doubt no doubt