Middle English word forwiten comes from Old English witan, Old English fōre-, and later Old English forewitan (To foreknow.)

Detailed word origin of forwiten

Dictionary entry	Language	Definition
witan	Old English (ang)	To be conscious of, to know or feel (an emotion etc.). To be wise. To know, be aware.
fōre-	Old English (ang)
fōrewitan	Old English (ang)
forewitan	Old English (ang)	To foreknow.
forwiten	Middle English (enm)

Words with the same origin as forwiten