Source : Webster's Revised Unabridged Dictionary (1913)

Enterprising \En"ter*pri`sing\, a.
   Having a disposition for enterprise; characterized by
   enterprise; resolute, active or prompt to attempt; as, an
   enterprising man or firm. -- {En"ter*pri`sing*ly}, adv.

Source : WordNet®

enterprisingly
     adv : in an enterprising manner; "`Let's go up that mountain,' she
           said enterprisingly"