ground swell
1 heavy slow-moving waves caused by a distant or recent storm or earthquake 長涌浪(由遠方或剛過去的暴風或地震引起的移動緩慢的巨浪).
2 (fig 比喻) rapidly developing general feeling or opinion 迅速高漲的情緒或輿論聲勢
Opinion polls have detected a ground swell of support for the Socialists. 民意測驗表明擁護社會黨的情緒高漲.