noun / verb
box
BAHKS/bɑːks/
A rigid container enclosing a defined space.
The open wooden box has rigid sides and an empty interior.

Etymology
The Greek name for the box tree, whose own origin is uncertain, came to name objects made from its wood. That material-based name developed into the general word for a container.
In context
like a box and put it into a bigger box that's what this tunnel represents it's a new bigger container that's going to hold the entire original message
More examples
- The family watches the play from a private theater box.
- Parked cars box the delivery van in on both sides.
- A small box beside the television receives the cable signal.
Forms
box · boxes · boxed · boxing