to cover with dust or make dusty; to coat with fine particles.
From be- (thorough prefix) + dust (from Old Norse dúst or Old English dust, related to Old High German dunst 'vapor'). The verb means to cover thoroughly with dust.
Dust comes from the same root as the word 'dunst' meaning vapor, because both are tiny particles floating in the air—showing how medieval people understood what dust really was.
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