Sentence:  <WSD>Bulldust</WSD> is like talcum powder and it covers the holes in the road. No matter how carefully we drove, the <WSD>bulldust</WSD> rose in the air and cascaded down over our vehicle to the extent that we sometimes used the wipers to clear the windscreen. 
Meaning of the word marked with <WSD> tags:  Fine red dust, found in desert regions of Australia.