challenging• This has to be achieved without adversely affectingdesignquality, a task that can prove quite challenging.• Planning a weddingreception for over 1000 guests will be very challenging.• Yet the custom side is more challenging and helps us to design and produce new and better products.• The only shortfall, he said, was of facilities for patients with very difficult and challengingbehaviour.• They had misgivings about Mr Major's diffidence, felt he was not carrying the battle to the strongly challengingenemy.• The job wasn't challenging enough for me - I wanted something more creative.• a challenging game• As we all know marine fishkeeping is a challenginghobby in so many ways.• A challenginglanguage, carrying with it the sweetallure of forbiddenfruit.• Bowden called the piece, "one of the most challenging pieces of music I've ever played."• But the really challenging upshot of the report was not this predictablehypocrisy.• Not only have there been many important exhibitions held on these issues but many women artists have developed brave and challenging work.