(un-, prefix1 affix 1; cf. Middle Dutch onfijn, Middle High German unvin, German unfein, Danish ufin.)

Unrefined, unpurified.

Of a product: not freed from impurities or extraneous matter; not purified.

Mixed with or containing some extraneous or foreign matter, esp. of an inferior or baser kind; contaminated, adulterated. Of things physical.