The phrase "left unopened" is correct and can be used in written English.
You could use it to describe something that has not been opened, viewed, used, or accessed. For example, "The package was left unopened on the doorstep."
Another problem frequently highlighted was "that letters could be left unopened or unread by claimants".
The players pick a case, which is left unopened, and then select other briefcases to be opened.
No spent shell casings were found at the scene, and the mystery deepened when it was discovered that the register in the store was left unopened and detectives did not find any property missing, the police said.
News reports showed adults (and the odd kid) carting out multiple purchases: one to be played with, the others to be left unopened, kept in mint condition, in the belief that they will become great investments.
Not surprisingly, this is a subject that some of my compatriots in Georgia view as a potentially hazardous can of worms that may be better left unopened.
However, this is not the case with non-invasive CT, where the thorax is left unopened and no geometric artefacts appear.
Do not leave unopened cans for people to take for themselves, they will be stolen.
The Senate investigation revealed Forbes had left 200,000 unopened pieces of mail from veterans at the Bureau.
When Carr goes online he complains of constant interruption by email, Twitter and Facebook updates, though I seem to have the option to leave clients unopened or turn off notifications.
We're allowed to eat hibernation food, gorging on carbs to the point of catatonia, until we become so filled with self-loathing that we buy the first celebrity fitness DVD we see in January, and leave it unopened because we can't believe we've sunk so low.
My only reservation is that it looks so cool in the box that it seems a shame to remove it, so I leave it unopened and place it on my desk so that it can be coveted until my girlfriend and baby boy are sound asleep (she knows about it, by the way).
