Adjectives

(s)drawn-out, extended, lengthy, prolonged, protractedrelatively 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”
(s)elongated, extended, lengthened, prolongeddrawn 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”