v stir up (water) so as to form ripplesv occur in soft rounded shapesv move in a wavy pattern or with a rising and falling motionv increase and decrease in volume or pitch, as if in waves
v. 波动, 起伏, 呈波浪形( undulate的现在分词 ); 使波动, 使起伏, 使成波浪形; 波状