大水 + Noun
The compound 大水 (dàshuǐ) combines the adjective 大 (big) with 水 (water) to mean "big water" or a large volume of water. It can also function as a modifier for containers, as in 大水桶 (big water bucket).
下了一场大雨,路上到处都是大水。
xià le yī chǎng dà yǔ, lù shàng dàochù dōu shì dà shuǐ.
After a heavy rain, there was flooding everywhere on the roads.
爷爷提着一桶大水去浇菜地。
yéye tí zhe yī tǒng dà shuǐ qù jiāo càidì.
Grandpa carried a bucket of water to water the vegetable garden.
院子里的大水还没有退。
yuànzi lǐ de dà shuǐ hái méiyǒu tuì.
The floodwater in the yard still hasn't receded.