Source : Webster's Revised Unabridged Dictionary (1913)

Intently \In*tent"ly\, adv.
   In an intent manner; as, the eyes intently fixed.

   Syn: Fixedly; steadfastly; earnestly; attentively;
        sedulously; diligently; eagerly.

Source : WordNet®

intently
     adv : with strained or eager attention; "listened intently";
           "stood watching intently"