Of Rive; rent or burst asunder.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (participle) (p. p.) (past participle)

Usage examples:

It was as if some tight bandage were cleft and violently riven from it.
- Notwithstanding by Mary Cholmondeley
In one place a huge mass has been riven from the main body of rock and fallen into the sea.
- The Anti-Slavery Examiner, Omnibus by American Anti-Slavery Society
It was not a mere effort to overbear their sorrow- an outward semblance of reconciliation to their hard fate- but it was a deep fountain of real gladness, welling up from their riven spirits.
- Memories of Bethany by John Ross Macduff