prolonged

Adjective

• drawn out or made longer spatially
  • Picasso's elongated Don Quixote
    
  • lengthened skirts are fashionable this year
    
  • the extended airport runways can accommodate larger planes
    
  • a prolonged black line across the page
    

• relatively long in duration; tediously protracted
  • a drawn-out argument
    
  • an extended discussion
    
  • a lengthy visit from her mother-in-law
    
  • a prolonged and bitter struggle
    
  • protracted negotiations
    

Related words

• Synonyms: 
  elongated , extended , lengthened , drawn-out , lengthy , protracted