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rehabilitate - To renovate or repair something, such as a building, facility, person, or environment, to make it more usable or up to current standards.

The city invested in programs to rehabilitate the old industrial district, transforming it into a vibrant area for businesses and residents.
sober - Serious and thoughtful in mood or behavior, not playful or exaggerated; or not under the influence of alcohol or drugs; clear-minded.

It was a year since he gave up drinking and had decided to remain sober all the time, and it took strength to just walk past the bar.