
Hollow
Physical emptiness
Use 'hollow' to describe objects that are empty on the inside, like tubes or boxes.

She tapped the wall, looking for the hollow parts.
Sound quality
'Hollow' can also describe a sound that echoes, as if coming from an empty space.

The room's acoustics made her voice sound hollow.
Compare with
BareCavernousConcaveDesolateEchoEmptyGauntHazyShallowSunkenVacant
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