* Despite her age, her mental faculties remained unimpaired. (This sentence emphasizes that the person's mental abilities are still strong, even though she is old.)
* The accident left her with a broken leg, but her vision remained unimpaired. (This sentence contrasts the physical injury with the unaffected sense of sight.)
* The engine's performance remained unimpaired after the long journey. (This sentence shows that the engine continued to function well, even after a lot of use.)
* His memory, though not perfect, was unimpaired by the years. (This sentence highlights the fact that his memory was still good, even though it wasn't perfect.)
* The storm caused widespread damage, but the power lines remained unimpaired. (This sentence contrasts the destruction caused by the storm with the unharmed power lines.)
Unimpaired means "not damaged or weakened," so it is often used to describe something that is functioning normally despite potential difficulties.