Devolve (verb)

1. To pass on or delegate responsibilities, powers, or duties to a subordinate or less important level.
2. To degenerate or deteriorate over time.
3. To evolve or develop in a direction considered inferior or less advanced.

Origin:

From latin devolvere "to roll down".

Examples:

1. As the manager retired, the responsibilities devolved onto his assistant.
2. The once-thriving city devolved into a crumbling metropolis.
3. The society devolved into a state of anarchy after the collapse of the government.
4. The company devolved the power to make decisions to its regional managers.
5. The conversation devolved into a heated argument.