longHe's been gone a long time.
lengthyAirline passengers may face lengthy delays during holiday travel.
sustainedWe continue to see sustained economic growth.
extendedStanding for extended periods of time can be bad for your back.
protractedManagement was locked in protracted negotiations with the unions.
drawn-outIt is likely to be a drawn-out discussion.
long-drawn-outApplying for a work visa is a long-drawn-out process.
lingeringHe had a lingering cough.