undulate


undulate (http://definr.com/undulate)

     adj : having a sinuate margin and rippled surface
     v 1: stir up (water) so as to form ripples [syn: ripple, ruffle,
           riffle, cockle]
     2: occur in soft rounded shapes; "The hills rolled past" [syn:
        roll]
     3: move in a wavy pattern, as of curtains [syn: flap, wave]