unsprung
/ʌnˈsprʌŋ
/adjective
Not provided with springs: an antiquated, unsprung settee...
- A mattress on an unsprung base (including fixed-slat bases) should last about 10 years.
- He sat upon the unsprung bed and looked across the cell.
- Try an alternative bed-base and unsprung mattress, preferably with natural materials.