deteriorate

As this attachment deteriorated, the ice upstream began to flow more quickly, reducing the shelf's mechanical stability.

Having lived with a respiratory illness since the age of two, his health deteriorated and he was told he needed a double lung transplant.

His condition deteriorated rapidly, and he later became unable to use any of his limbs.

O'Sullivan keeps himself fit by running, but it is harder to ward off other aspects of ageing, such as deteriorating eyesight, which Williams knows only too well.

Following the programme, relations between Mr Welch and some residents, including Mr Chesworth and Ms Porter-Garroch, deteriorated further in a dispute over electricity payments.