The Collaborative International Dictionary of English v.0.48:

Potently \Po"tent*ly\, adv.
   With great force or energy; powerfully; efficaciously. "You
   are potently opposed." --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

potently
    adv 1: in a manner having a powerful influence; "Clytemnestra's
           ghost crying in the night for vengeance remained most
           potently in the audience's mind" [syn: potently,
           powerfully]