资料来源 : Webster's Revised Unabridged Dictionary (1913)

Promising \Prom"is*ing\, a.
   Making a promise or promises; affording hope or assurance;
   as, promising person; a promising day. -- {Prom"is*ing*ly},
   adv.

资料来源 : WordNet®

promisingly
     adv : in an auspicious manner; "the afternoon had begun so
           promisingly"