“His unused guitar was left in the attic for many years.”

“You will be purchasing an unused coffee machine, still in its original packaging.”

“She shuffled around awkwardly, unused to being around so many strangers at once.”

“We thought it was a better user experience, and it gives us a second to weed out the completely unuseful comments.”

“If in the meantime it deserve the name of no unuseful trifle, 'tis all it is capable of.”

“So in zazen you learn how to zero these three hundreds percents of unuseful tensions which block you to go to this goal.”