passively

from WordNet (r) 3.0 (2006)

passively
    adv 1: in a passive manner; "he listened passively" [ant:
           {actively}]

from The Collaborative International Dictionary of English v.0.48

Passively \Pas"sive*ly\, adv.
   1. In a passive manner; inertly; unresistingly.
      [1913 Webster]

   2. As a passive verb; in the passive voice.
      [1913 Webster]