groundswell
/ˈgraʊndswel/noun
in sing.
1
- a build-up of opinion or feeling in a large section of the population（舆论、情绪的）迅速高涨：
an unexpected groundswell of opposition developed.
反对意见出乎意料地迅速高涨。
2
- a large or extensive swell in the sea海涌, 长涌, 激涌。