Source : Webster's Revised Unabridged Dictionary (1913)

Heedless \Heed"less\, a.
   Without heed or care; inattentive; careless; thoughtless;
   unobservant.

         O, negligent and heedless discipline!    --Shak.

         The heedless lover does not know Whose eyes they are
         that wound him so.                       --Waller.
   -- {Heed"less*ly}, adv. -- {Heed"less*ness}, n.

Source : WordNet®

heedlessly
     adv : without care or concern; "carelessly raised the children's
           hopes without thinking of their possible
           disappointment" [syn: {carelessly}]