sprinkling water; sprinkled water
Refers to the act of sprinkling water on the ground, or the water itself. Often used in contexts like dust control, cooling pavement, or gardening.
On summer evenings, sprinkling water in the garden makes it cooler.
At the construction site, water is sprinkled to prevent dust.
Compound of 撒き (maki, the continuative form of 撒く 'to scatter, sprinkle') + 水 (mizu, 'water'). The reading まきみず is a straightforward combination.