* Formal/Academic: "The company's decision to abandon its sustainable practices caused its environmental performance to retrogress significantly."
* Descriptive: "After the initial success, the project began to retrogress due to lack of funding and support."
* Figurative: "Despite his initial enthusiasm, his commitment to the project started to retrogress as he faced increasing challenges."
* Negative: "The country's political system has retrogressed back to authoritarian rule."
Remember, "retrogress" means to go back to a previous, worse state. It's usually used to describe a negative change or decline.