Source : Webster's Revised Unabridged Dictionary (1913)

Primitively \Prim"i*tive*ly\, adv.
   1. Originally; at first.

   2. Primarily; not derivatively.

   3. According to the original rule or ancient practice; in the
      ancient style. --South.

Source : WordNet®

primitively
     adv 1: with reference to the origin or beginning [syn: {originally},
             {in the beginning}]
     2: in a primitive style or manner; "rather primitively operated
        foundries"