Source : Webster's Revised Unabridged Dictionary (1913)

Advertent \Ad*vert"ent\, a. [L. advertens, -entis, p. pr. of
   advertere. See {Advert}.]
   Attentive; heedful; regardful. --Sir M. Hale. --
   {Ad*vert"ent*ly}, adv.

Source : WordNet®

advertently
     adv : in a careful deliberate manner [syn: {mindfully}, {heedfully}]
           [ant: {unwittingly}, {unmindfully}]