blindly

from WordNet (r) 3.0 (2006)

blindly
    adv 1: without seeing or looking; "he felt around his desk
           blindly"
    2: without preparation or reflection; without a rational basis;
       "they bought the car blindly"; "he picked a wife blindly"

from The Collaborative International Dictionary of English v.0.48

Blindly \Blind"ly\, adv.
   Without sight, discernment, or understanding; without
   thought, investigation, knowledge, or purpose of one's own.
   [1913 Webster]

         By his imperious mistress blindly led.   --Dryden.
   [1913 Webster] Blindman's buff