cloud of sand; cloud of dust
Refers to a visible cloud of sand or dust raised by wind, vehicles, or movement. Often used in descriptive or news contexts.
When the car passed, a cloud of sand rose up.
A cloud of dust hung in the air from the strong wind, reducing visibility.
Compound of 砂 (すな, 'sand') and 煙 (けむり, 'smoke'), literally 'sand smoke'. The reading けむり is the native Japanese word for smoke.