Definition of "wist"

wist¹

/wɪst/

verb
1. (archaic) simple past and past participle of wit.
  Quotations
  And lang ere witless Jeanie wist, / Her heart was tint, her peace was stown!
  a1796, Robert Burns, "Bonie Jean: A Ballad", in Poems and Songs, P.F. Collier & Son (1909–14), Bartleby.com (2001)
  Did the maledicent Bodyguard, getting (as was too inevitable) better malediction than he gave, load his musketoon, and threaten to fire; and actually fire? Were wise who wist!
  1837, Thomas Carlyle, The French Revolution: A History […], volumes (please specify |volume=I to III), London: Chapman and Hall, (please specify the book or page number)

wist²

/wɪst/

verb
third-person singular simple present wists, present participle wisting, simple past and past participle wisted
1. (nonstandard, pseudo-archaic) To know, be aware of.