undulate(verb) increase and decrease in volume or pitch, as if in waves; "The singer's voice undulated"
(verb) move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach"
(verb) stir up (water) so as to form ripples
(verb) occur in soft rounded shapes; "The hills rolled past"
(adjective satellite) having a sinuate margin and rippled surface
Source:
WordNet 2.0 Copyright 2003 by Princeton University. All rights reserved.
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