The Collaborative International Dictionary of English v.0.48:

Scarp \Scarp\, v. t. [imp. & p. p. Scarped; p. pr. & vb. n.
   Scarping.]
   To cut down perpendicularly, or nearly so; as, to scarp the
   face of a ditch or a rock.
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         From scarped cliff and quarried stone.   --Tennyson.
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         Sweep ruins from the scarped mountain.   --Emerson.
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