资料来源 : pyDict

险峻地

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

Steeply \Steep"ly\, adv.
   In a steep manner; with steepness; with precipitous
   declivity.

资料来源 : WordNet®

steeply
     adv : in a steep manner; "the street rose steeply up to the
           castle"