What is "punishingly"

Usage examples of "punishingly".

As they both jogged in track suits along punishingly steep footpaths, watching the first celandine and coltsfoot pushing their way through the leaf mould and the winter barley slowly turning the brown fields pale green, Lysander wished it was Arthur he was getting fit for the Rutminster Gold Cup rather than Marigold, but they made terrific progress.

Very large television sets hang from the ceilings in the departure lounge, showing the Airport Channel, which is a parade of news-bits even more punishingly flimsy than normal television news, mixed in with a great deal of weather and stock quotes.