Slop"ing*ly

from The Collaborative International Dictionary of English v.0.48

Sloping \Slop"ing\, a.
   Inclining or inclined from the plane of the horizon, or from
   a horizontal or other right line; oblique; declivous;
   slanting. -- {Slop"ing*ly}, adv.
   [1913 Webster]

         The sloping land recedes into the clouds. --Cowper.
   [1913 Webster]