The quality of being soft, padded, and comfortable like a cushion.
From the adjective 'cushiony' (meaning resembling or having qualities of cushions) plus the abstract noun suffix '-ness'. A back-formed term creating a specialized vocabulary for textile comfort.
This word exists at the intersection of physics and psychology—cushioniness measures both literal softness and our emotional feeling of being supported, which is why high-end bedding brands invest millions describing their products' cushioniness.
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