As adjectives the difference between unwinnowed and unwindowed
is that unwinnowed
is not winnowed while unwindowed
is without windows.
As a verb winnow
is (agriculture) to subject (granular material, especially food grain) to a current of air separating heavier and lighter components, as grain from chaff.
As a noun winnow
is that which winnows or which is used in winnowing; a contrivance for fanning or winnowing grain.
As an adjective unwinnowed is