The senator struggled to provide a coherent explanation for the policy's sudden reversal.
Co（共同）+ her（拿/抓）+ ent → 大家一起抓住要点 → 连贯一致
Health officials urged residents to take necessary precautions against the rising humidity and mold.
Pre（提前）+ caution（小心）→ 提前小心 → 预防措施
Consumers began to boycott the brand after the scandal over labor practices was revealed.
Boycott 源自 Charles Boycott（爱尔兰地主），人们联合起来不理他 -> 联合抵制。
The dam ruptured during the heavy storm, causing severe flooding in the valley.
Rup(破裂) + ture(名词后缀) -> 像气球炸开一样 -> 破裂。
The board of directors rejected the proposal, citing concerns over the high financial risk involved.
Re- (再次) + ject (扔)。把东西扔回去，就是“拒绝”。