The Collaborative International Dictionary of English v.0.48:

Wit \Wit\ (w[i^]t), v. t. & i. [inf. (To) Wit; pres. sing.
   Wot; pl. Wite; imp. Wist(e); p. p. Wist; p. pr. & vb.
   n. Wit(t)ing. See the Note below.] [OE. witen, pres. ich
   wot, wat, I know (wot), imp. wiste, AS. witan, pres. w[=a]t,
   imp. wiste, wisse; akin to OFries. wita, OS. witan, D. weten,
   G. wissen, OHG. wizzan, Icel. vita, Sw. veta, Dan. vide,
   Goth. witan to observe, wait I know, Russ. vidiete to see, L.
   videre, Gr. ?, Skr. vid to know, learn; cf. Skr. vid to find.
   ????. Cf. History, Idea, Idol, -oid, Twit, Veda,
   Vision, Wise, a. & n., Wot.]
   To know; to learn. "I wot and wist alway." --Chaucer.
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   Note: The present tense was inflected as follows; sing. 1st
         pers. wot; 2d pers. wost, or wot(t)est; 3d pers. wot,
         or wot(t)eth; pl. witen, or wite. The following variant
         forms also occur; pres. sing. 1st & 3d pers. wat, woot;
         pres. pl. wyten, or wyte, weete, wote, wot; imp. wuste
         (Southern dialect); p. pr. wotting. Later, other
         variant or corrupt forms are found, as, in Shakespeare,
         3d pers. sing. pres. wots.
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               Brethren, we do you to wit [make you to know] of
               the grace of God bestowed on the churches of
               Macedonia.                         --2 Cor. viii.
                                                  1.
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               Thou wost full little what thou meanest.
                                                  --Chaucer.
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               We witen not what thing we prayen here.
                                                  --Chaucer.
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               When that the sooth in wist.       --Chaucer.
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   Note: This verb is now used only in the infinitive, to wit,
         which is employed, especially in legal language, to
         call attention to a particular thing, or to a more
         particular specification of what has preceded, and is
         equivalent to namely, that is to say.
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