Retrogressive (adjective)

1. Moving, developing, or tending to return to an earlier or less advanced state or condition.
2. Relating to or characterized by retrogression, or a reverse in progress or development.

Origin:

From latin retro-, meaning "backward" + gradi, meaning "to step".

Examples:

1. The retrogressive changes in the society were a cause of concern for many citizens.
2. The retrogressive policies of the government led to a decline in the economy.
3. The retrogressive trend in the company's performance was a source of worry for the investors.
4. The retrogressive evolution of the species was a subject of study for the biologists.
5. The retrogressive changes in the climate were causing a loss of biodiversity in the region.