Definition of unsprung in English:

unsprung

adjective

  • Not provided with springs.

    ‘an antiquated, unsprung settee’
    • ‘He sat upon the unsprung bed and looked across the cell.’
    • ‘A mattress on an unsprung base (including fixed-slat bases) should last about 10 years.’
    • ‘Try an alternative bed-base and unsprung mattress, preferably with natural materials.’

Pronunciation:

unsprung

/ʌnˈsprʌŋ/