Source : Webster's Revised Unabridged Dictionary (1913)

Unwisely \Un*wise"ly\, adv. [AS. unw[=i]slice.]
   In an unwise manner; foolishly.

Source : WordNet®

unwisely
     adv : without good sense or judgment; "He acted foolishly when he
           agreed to come" [syn: {foolishly}] [ant: {wisely}]