prolonged prolonged /prəˈlɔŋd/

adjective

1. () Relatively long in duration; tediously protracted  ( drawn-out , protracted , long-drawn-out , extended , lengthy , prolonged )
   relatively long in duration; tediously protracted
    A drawn-out argument
   a drawn-out argument
    An extended discussion
   an extended discussion
    A lengthy visit from her mother-in-law
   a lengthy visit from her mother-in-law
    A prolonged and bitter struggle
   a prolonged and bitter struggle
    Protracted negotiations
   protracted negotiations
   
2. Drawn out or made longer spatially  ( extended , lengthened , prolonged , elongated )
   drawn out or made longer spatially
    Picasso's elongated Don Quixote
   Picasso's elongated Don Quixote
    Lengthened skirts are fashionable this year
   lengthened skirts are fashionable this year
    The extended airport runways can accommodate larger planes
   the extended airport runways can accommodate larger planes
    A prolonged black line across the page
   a prolonged black line across the page