New words：

disaster [dɪˈzæstər] n.灾害；灾难；灾祸；不幸

详细词源拆解：

源自意大利语，拆分词缀：dis- 否定 / 坏 + aster (星体、星象)；
古人认为星辰运转异常会带来厄运与灾祸，本义为 “凶星、不祥天象”，
后来词义固定，泛指灾难、灾祸、重大不幸、彻底失败。

词汇家族

disaster → disastrous [dɪˈzæstrəs]（adj. 灾难性的；极糟糕的）
disastrous → disastrously [dɪˈzæstrəslɪ]（adv. 灾难性地；糟糕至极地）

必记高频搭配

natural disaster 自然灾害

Floods and earthquakes are common natural disasters on the earth.

disaster area 灾区

Many volunteers went to the disaster area to help poor people.

suffer from a disaster 遭受灾难

The whole town suffered from a serious disaster last year.

cause a disaster 引发灾难

Bad weather may cause a terrible disaster in some places.

词性转换活用

disaster (n. 灾难)

We need to protect the environment to reduce natural disasters.

disastrous [dɪˈzæstrəs] (adj. 灾难性的)

The disastrous strong storm broke many green trees.

disastrously [dɪˈzæstrəslɪ] (adv. 灾难性地；糟糕至极地)

The whole sports meeting was disastrously influenced by bad weather.

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