Source : Webster's Revised Unabridged Dictionary (1913)

Incompetently \In*com"pe*tent*ly\, adv.
   In an competent manner; inadequately; unsuitably.

Source : WordNet®

incompetently
     adv : in an incompetent manner; "he did the job rather
           incompetently" [syn: {displaying incompetence}] [ant: {competently}]