Source : Webster's Revised Unabridged Dictionary (1913)

Disagreeably \Dis`a*gree"a*bly\, adv.
   In a disagreeable manner; unsuitably; offensively.

Source : WordNet®

disagreeably
     adv : in a disagreeable manner; "`I took no harm from the journey,
           thank you,' she said disagreeably" [ant: {pleasantly}]