洪水
こうずい
kouzui
The word refers to a large-scale overflow of water, typically associated with natural disasters. While it is often used interchangeably with "氾濫" (hanran), "氾濫" focuses more on the physical phenomenon of water overflowing its banks, whereas "洪水" (kouzui) emphasizes the resulting disaster and the overall state of flooding.
In a metaphorical sense, it describes an overwhelming quantity of something arriving all at once, similar to the English "flood" or "deluge." This usage is common in professional or social contexts to express being overwhelmed by a sudden surge of requests, complaints, or data.
When using the metaphorical sense, it is frequently paired with verbs like "溺れる" (oboreru - to drown/be overwhelmed) or "押し寄せる" (oshiyoseru - to surge/rush in), emphasizing the feeling of being unable to cope with the volume.