Flood
Noun, する verb, and の adjective
しんすい
気温が上がるのは素晴らしいことだけど、私達は雪解け水による浸水を心配しています。
It’s great that the temperature is rising, but we’re worried about a flood from the melting snow.
Immersed in water. That sounds like submersion. Possibly like a flood, even.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.