
Cavity
Metaphorical Use
Sometimes 'cavity' is used metaphorically to express emptiness in non-physical things.

The book left a cavity in her heart.
Negative Connotation
'Cavity' often implies a problem or a deficiency needing to be addressed.

The engineers found a cavity in the spacecraft's insulation.
Physical Structures
In construction or architecture, 'cavity' refers to a designed gap within walls.

This building has cavity walls for better insulation.
Compare with
ConcavityDentDepressionExcavateHoleHollowIndentationPitRecess
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