Often implies frustration or difficulty due to the extended length of time. Her recovery from injury was protracted, causing her to miss the entire season.
Pro Tip 2/3
Impatience Implied
Can suggest that someone is impatient with the duration of an event. The protracted meeting made the attendees restless.
Pro Tip 3/3
Emphasize Duration
Use it to emphasize that something takes more time than necessary or expected. The construction of the bridge was protracted due to bad weather.