He died from severe dehydration.是什么意思？

He died from severe dehydration.

他死于严重脱水.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

died

v. 死亡，枯萎（ die的过去式和过去分词 ），死时处于（某种状态）或具有（某种身份）；adj. 死亡的，消逝的；

例句
Both of them died in abject poverty...
他们两人都于穷困潦倒中死去。

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

severe

adj. 严峻的，严厉的，剧烈的，苛刻的；

例句
He had severe abrasions to his right cheek.
他的右脸颊有严重的擦伤。

dehydration

n. 脱水，干燥，极度口渴，失水；

例句
The single butanol complexation dehydration technology cannot take all coordinated water molecules in bischofite away.
采用单纯的丁醇络合脱水方法难以完全脱除水氯镁石中的结晶水.