unswept
Still gathering dust
Unswept describes a surface that hasn't been swept clean—typically a floor covered with dust, debris, or fallen leaves: The unswept porch was littered with dead leaves.
The word suggests neglect or the absence of routine cleaning: unswept corners, unswept streets.
dust
Fine settled particles
cobwebs · leaves · crumbs · litter · soot · grit · filth · mud · residue · scattered
floors
Walking surfaces inside
sidewalk · doorstep · patio · entryway · walkway · courtyard · alley · stairwell · basement · attic