ほこり, ちり
fine, dry powder consisting of tiny particles of earth or waste matter lying on surfaces or carried in the air
:
• The old books were covered in a thick layer of dust.
古い本は厚いほこりの層で覆われていた。
• A cloud of dust rose as the car drove away.
車が走り去ると、ほこりの雲が舞い上がった。