The Collaborative International Dictionary of English v.0.48:

Weet \Weet\, a. & n.
   Wet. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Weet \Weet\, v. i. [imp. Wot.] [See Wit to know.]
   To know; to wit. [Obs.] --Tyndale. Spenser.
   [1913 Webster]