deluge [ˈdelju:dʒ]

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n./vt.洪水，暴雨，使泛滥

a very large amount of rain or water

This little stream can become a deluge when it rains heavily. 雨大的时候，这条小溪能变作洪流。
I got caught in the deluge on the way home. 我在回家的路上遇到倾盆大雨。