Synonyms for Drawn-out (same or very similar meaning)
WordNet sense 1 (relatively long in duration; tediously protracted):
extended, lengthy, prolongedWordNet sense 2 (primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified):
longWordNet sense 3 (not moving quickly; taking a comparatively long time):
slowFrom the ODE community, based on WordNetadd/edit