chambering

To enclose in a room.

“She had chambered herself in her room, and wouldn't come out.”

To reside in or occupy a chamber or chambers.

To place in a chamber, as a round of ammunition.

“The hunter fired at the geese and missed, then shrugged his shoulders and chambered another cartridge.”

To create or modify a gun to be a specific caliber.

“The rifle was originally chambered for 9mm, but had since been modified for a larger, wildcat caliber.”

In martial arts, to prepare an offensive, defensive, or counteroffensive action by drawing a limb or weapon to a position where it may be charged with kinetic energy.

“Bob chambered his fist for a blow, but Sheila struck first.”

To be lascivious.

The chamber of a gun or other firearm.