1.

1. 搅混 使烦恼或不安;使生气：recoil 畏缩, 后退 | roil 搅混 使烦恼或不安;使生气 | cavil 吹毛求疵或琐屑的指责

2. roil

2. 动荡：roguish 流氓的 | roil 动荡 | roily 搅乱的

3. roil

3. 滚动阻尼：relative 相对衰减 | roil 滚动阻尼 | short 快速蒸熏

4. roil在线翻译

4. 彻底搅拌：rogueing 拔株去劣 | roil 彻底搅拌 | roil 搅浑

1. (水)激荡，翻滚，翻腾
    If water roils, it is rough and disturbed.

    e.g. The water roiled to his left as he climbed carefully at the edge of the waterfall.
           当他在瀑布边缘小心攀爬时，水就在他左边奔腾。

2. 扰乱;搅乱;使混乱
    Something that roils a state or situation makes it disturbed and confused.

    e.g. Times of national turmoil generally roil a country''s financial markets.
           在国家动荡不安的时代，该国的金融市场一般都会出现混乱。

1. make turbid by stirring up the sediments of

    Synonym: rile

2. be agitated

    e.g. the sea was churning in the storm

    Synonym: churnboilmoil