IPA: /ʌnˈoʊpənd/
KK: /ʌnˈoʊpənd/
Not yet opened; still closed.
The unopened package sat on the porch for days.
Unopened → It is formed from "un-" (meaning not) and "open" (from Old English "openian", meaning to open). The word "unopened" means not opened or still in its original sealed state.
Think of 'not' ('un-') having been 'opened' — that's why unopened means something that has not been opened.