Merriam-Webster Collegiate Dictionary - devolve

 verb  (~d; devolving)  Etymology: Middle English, from Latin ~re, from de- + volvere to roll — more at voluble  Date: 15th century  transitive verb to pass on (as responsibility, rights, or powers) from one person or entity to another devolving to western Europe full responsibility for its own defense — Christopher Lane  intransitive verb  1.  a. to pass by transmission or succession the estate ~d on a distant cousin  b. to fall or be passed usually as a responsibility or obligation the responsibility for breadwinning has ~d increasingly upon women — Barbara Ehrenreich  2. to come by or as if by flowing down his allegedly subversive campaigns…~ from his belief in basic American rights — Frank Deford  3. to degenerate through a gradual change or evolution where order ~s into chaos — Johns Hopkins Magazine