unbox

From un- +‎ box.

unbox (third-person singular simple present unboxes, present participle unboxing, simple past and past participle unboxed)

1. (transitive) To remove from a box.
   • 2005, Andrew Laties, Rebel Bookseller:

     The booksellers' tasks were to unbox, shelve, and handle cash.

2. (transitive, computing) To retrieve (a value of a primitive type) from the object in which it is boxed.
   • 2004, Stephen Teilhet, Jay Hilyard, C# Cookbook:

     When a boxing or unboxing operation occurs in code, whether it was implicit or explicit, the IL generated includes the box or unbox command.

• (remove from a box): unpack, uncase, undo

• (antonym(s) of “remove from a box”): pack, box up

• unboxing