un ‧ o ‧ pened /ʌnˈəʊpənd $ -ˈoʊ-/ BrE AmE adjective
[ Word Family: noun : the open, ↑ opener , ↑ opening , ↑ openness ; adjective : ↑ open , ↑ opening , ↑ unopened ; verb : ↑ open ; adverb : ↑ openly ]
an unopened package, letter etc has not been opened yet:
The letter was returned to us unopened.